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My experience to build a custom Android SDK for a manipulated Android with new functions.

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Building custom SDK
Building custom SDK
 
 
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Building custom SDK

Logs of building custom SDK

first: modifying proper files to add new API

I want to modify the setWifiEnabled function in WifiManager class in framework. actually I want to add new function with same name but with different input variables to get password string too. default signature of function is:

public boolean setWifiEnabled(boolean enabled);

and I want to add new function with this signature:

public boolean setWifiEnabledWithPassword(boolean enabled, String password);

and after that modify the original function to do nothing when called but for sake of backward compatibility I keep the function in the framework.

so there is some steps to do:

  • first trying to add the setWifiEnabledWithPassword completely like the setWifiEnabled function in all the source code and check the functionality of both functions.
  • compile the new sdk with added function and use it in Android studio to compile the proper applications.
  • modify the added function with the architecture that I designed and complete the function then check the functionality.
  • change old function to do nothing and turn off or even delete proper test cases that check the functionality of function
  • check all the functionalities

first: add new function

so at the first we have to add the new function with the following signature:

public boolean setWifiEnabledWithPassword(boolean enabled, String password);

we know the path of WifiManager class in AOSP it’s in the: ./frameworks/base/wifi/java/android/net/wifi/WifiManager.java

after adding the new function below the old one you should add the new function to other parts of source code.

simply use grep to do so:

grep -irl "WifiManager"

so here is the result in android-x86-marshmallow

./external/robolectric/src/test/java/com/xtremelabs/robolectric/shadows/WifiManagerTest.java:    public void setWifiEnabled_shouldThrowSecurityExceptionWhenAccessWifiStatePermissionNotGranted() throws Exception {
./external/robolectric/src/test/java/com/xtremelabs/robolectric/shadows/WifiManagerTest.java:        wifiManager.setWifiEnabled(true);
./external/robolectric/src/main/java/com/xtremelabs/robolectric/shadows/ShadowWifiManager.java:    public boolean setWifiEnabled(boolean wifiEnabled) {
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/NetworkActivity.java:                mConnectivityListener.setWifiEnabled(true);
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/NetworkActivity.java:                mConnectivityListener.setWifiEnabled(false);
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/ConnectivityListener.java:    public void setWifiEnabled(boolean enable) {
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/ConnectivityListener.java:        mWifiManager.setWifiEnabled(enable);
./packages/apps/ManagedProvisioning/src/com/android/managedprovisioning/WifiConfig.java:            mWifiManager.setWifiEnabled(true);
./packages/apps/ManagedProvisioning/src/com/android/managedprovisioning/task/AddWifiNetworkTask.java:                && (mWifiManager.isWifiEnabled() || mWifiManager.setWifiEnabled(true));
./packages/apps/Settings/src/com/android/settings/wifi/WifiEnabler.java:        if (!mWifiManager.setWifiEnabled(isChecked)) {
./packages/apps/Settings/src/com/android/settings/widget/SettingsAppWidgetProvider.java:                    wifiManager.setWifiEnabled(desiredState);
./development/apps/Development/src/com/android/development/Connectivity.java:                                mWm.setWifiEnabled(false);
./development/apps/Development/src/com/android/development/Connectivity.java:                                mWm.setWifiEnabled(true);
./development/apps/Development/src/com/android/development/Connectivity.java:                    mWm.setWifiEnabled(true);
./development/apps/Development/src/com/android/development/Connectivity.java:                    mWm.setWifiEnabled(false);
Binary file ./prebuilts/sdk/sdk-annotations/annotations.zip matchesd
./prebuilts/sdk/system-api/23.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/system-api/22.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/19.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/10.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/11.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/2.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/6.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/18.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/1.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/17.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/20.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/15.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/5.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/12.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/16.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/14.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/13.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/23.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/8.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/21.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/22.txt:    method public boolean setWifiEnabled(boolean);
./prebuilts/sdk/api/9.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/7.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/4.xml:<method name="setWifiEnabled"
./prebuilts/sdk/api/3.xml:<method name="setWifiEnabled"
./frameworks/data-binding/compiler/src/main/resources/api-versions.xml:		<method name="setWifiEnabled(Z)Z" />
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:        if (wifiEnabled) setWifiEnabled(wifiEnabled);
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:     * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)}
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:    public synchronized boolean setWifiEnabled(boolean enable) {
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:        Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid()
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:            Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n");
./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:            setWifiEnabled(true);
./frameworks/base/wifi/java/android/net/wifi/IWifiManager.aidl:    boolean setWifiEnabled(boolean enable);
./frameworks/base/wifi/java/android/net/wifi/WifiManager.java:    public boolean setWifiEnabled(boolean enabled) {
./frameworks/base/wifi/java/android/net/wifi/WifiManager.java:            return mService.setWifiEnabled(enabled);
./frameworks/base/core/tests/coretests/src/android/app/DownloadManagerBaseTest.java:        manager.setWifiEnabled(enable);
./frameworks/base/core/tests/hosttests/test-apps/DownloadManagerTestApp/src/com/android/frameworks/downloadmanagertests/DownloadManagerBaseTest.java:        manager.setWifiEnabled(enable);
./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:            mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        return mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        return mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        if (!mWifiManager.setWifiEnabled(false)) {
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        return mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:            mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:            mWifiManager.setWifiEnabled(true);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        return mWifiManager.setWifiEnabled(false);
./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        if (!mWifiManager.setWifiEnabled(false)) {
./frameworks/base/core/java/android/app/admin/DevicePolicyManager.java:     *   Use {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)} instead.</li>
./frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/SettingsBackupAgent.java:            mWfm.setWifiEnabled(enable);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(false);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:    protected void setWifiEnabled(boolean enabled) {
./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java:    void setWifiEnabled(boolean enabled);
./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkControllerImpl.java:    public void setWifiEnabled(final boolean enabled) {
./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkControllerImpl.java:                mWifiManager.setWifiEnabled(enabled);
./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:        mController.setWifiEnabled(!mState.enabled);
./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:            mController.setWifiEnabled(true);
./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:            mController.setWifiEnabled(state);
./frameworks/base/api/current.txt:    method public boolean setWifiEnabled(boolean);
./frameworks/base/api/system-current.txt:    method public boolean setWifiEnabled(boolean);
./frameworks/base/cmds/svc/src/com/android/commands/svc/WifiCommand.java:                    wifiMgr.setWifiEnabled(flag);

the file of output is: output.txt

that should change each file in the following format:

# skipped because they use the old method
./external/robolectric/src/test/java/com/xtremelabs/robolectric/shadows/WifiManagerTest.java:    public void setWifiEnabled_shouldThrowSecurityExceptionWhenAccessWifiStatePermissionNotGranted() throws Exception {
./external/robolectric/src/test/java/com/xtremelabs/robolectric/shadows/WifiManagerTest.java:        wifiManager.setWifiEnabled(true);
./external/robolectric/src/main/java/com/xtremelabs/robolectric/shadows/ShadowWifiManager.java:    public boolean setWifiEnabled(boolean wifiEnabled) {
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/NetworkActivity.java:                mConnectivityListener.setWifiEnabled(true);
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/NetworkActivity.java:                mConnectivityListener.setWifiEnabled(false);
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/ConnectivityListener.java:    public void setWifiEnabled(boolean enable) {
./packages/apps/TvSettings/Settings/src/com/android/tv/settings/connectivity/ConnectivityListener.java:        mWifiManager.setWifiEnabled(enable);
./packages/apps/ManagedProvisioning/src/com/android/managedprovisioning/WifiConfig.java:            mWifiManager.setWifiEnabled(true);
./packages/apps/ManagedProvisioning/src/com/android/managedprovisioning/task/AddWifiNetworkTask.java:                && (mWifiManager.isWifiEnabled() || mWifiManager.setWifiEnabled(true));
./packages/apps/Settings/src/com/android/settings/wifi/WifiEnabler.java:        if (!mWifiManager.setWifiEnabled(isChecked)) {
./packages/apps/Settings/src/com/android/settings/widget/SettingsAppWidgetProvider.java:                    wifiManager.setWifiEnabled(desiredState);
./development/apps/Development/src/com/android/development/Connectivity.java:                                mWm.setWifiEnabled(false);
./development/apps/Development/src/com/android/development/Connectivity.java:                                mWm.setWifiEnabled(true);
./development/apps/Development/src/com/android/development/Connectivity.java:                    mWm.setWifiEnabled(true);
./development/apps/Development/src/com/android/development/Connectivity.java:                    mWm.setWifiEnabled(false);


# skipped because it was binary  file 
Binary file ./prebuilts/sdk/sdk-annotations/annotations.zip matchesd



# in the ./prebuilts/sdk/api/NUM.txt
method public boolean setWifiEnabledWithPassword(boolean, java.lang.String);

# in the ./prebuilts/sdk/api/NUM.xml
<method name="setWifiEnabledWithPassword"
 return="boolean"
 abstract="false"
 native="false"
 synchronized="false"
 static="false"
 final="false"
 deprecated="not deprecated"
 visibility="public"
>
<parameter name="enabled" type="boolean">
</parameter>

<parameter name="password" type="java.lang.String">
</parameter>
</method>

# in the ./frameworks/data-binding/compiler/src/main/resources/api-versions.xml:
 <method name="setWifiEnabledWithPassword(Z;Ljava/lang/String)Z" />
 
 # these files skipped
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:        if (wifiEnabled) setWifiEnabled(wifiEnabled);
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:     * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)}
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:    public synchronized boolean setWifiEnabled(boolean enable) {
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:        Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid()
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:            Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n");
 ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:            setWifiEnabled(true);
 
 
 
 
 
 
 # in the ./frameworks/base/wifi/java/android/net/wifi/IWifiManager.aidl
 
 boolean setWifiEnabledWithPassword(boolean enabled, String password);
 
 
 # skipped beacuse of tests
 
 ./frameworks/base/core/tests/coretests/src/android/app/DownloadManagerBaseTest.java:        manager.setWifiEnabled(enable);
 ./frameworks/base/core/tests/hosttests/test-apps/DownloadManagerTestApp/src/com/android/frameworks/downloadmanagertests/DownloadManagerBaseTest.java:        manager.setWifiEnabled(enable);
 ./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:            mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        return mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        return mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/bandwidthtests/src/com/android/bandwidthtest/util/ConnectionUtil.java:        if (!mWifiManager.setWifiEnabled(false)) {
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/unit/WifiClientTest.java:        mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        return mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:            mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:            mWifiManager.setWifiEnabled(true);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        return mWifiManager.setWifiEnabled(false);
 ./frameworks/base/core/tests/ConnectivityManagerTest/src/com/android/connectivitymanagertest/ConnectivityManagerTestBase.java:        if (!mWifiManager.setWifiEnabled(false)) {
 
 
 
 
 
 #skipped because that was just a simple html file

 ./frameworks/base/core/java/android/app/admin/DevicePolicyManager.java:     *   Use {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)} instead.</li>
 
 
 
 # skipped because they was for systemUI and setting application in android
 
 ./frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/SettingsBackupAgent.java:            mWfm.setWifiEnabled(enable);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(false);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:        setWifiEnabled(true);
 ./frameworks/base/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerWifiTest.java:    protected void setWifiEnabled(boolean enabled) {
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java:    void setWifiEnabled(boolean enabled);
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkControllerImpl.java:    public void setWifiEnabled(final boolean enabled) {
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkControllerImpl.java:                mWifiManager.setWifiEnabled(enabled);
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:        mController.setWifiEnabled(!mState.enabled);
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:            mController.setWifiEnabled(true);
 ./frameworks/base/packages/SystemUI/src/com/android/systemui/qs/tiles/WifiTile.java:            mController.setWifiEnabled(state);
 
 
 
 # in the ./frameworks/base/api/current.txt
 method public boolean setWifiEnabledWithPassword(boolean, java.lang.String);
 
 
 # in the ./frameworks/base/api/system-current.txt
 method public boolean setWifiEnabledWithPassword(boolean, java.lang.String);
 
 
 #skipped because it uses the old one 
 ./frameworks/base/cmds/svc/src/com/android/commands/svc/WifiCommand.java                wifiMgr.setWifiEnabled(flag);
 
 
 # in the file ./frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java in line 615
 added this code
 /**
     * see {@link android.net.wifi.WifiManager#setWifiEnabledWithPassword(boolean, String)}
     * @param enable {@code true} to enable, {@code false} to disable.
     * @param password to check the password from user with provided password from admin user
     * @return {@code true} if the enable/disable operation was
     *         started or is already in the queue.
     */
 public synchronized boolean setWifiEnabledWithPassword(boolean enable, String password) {
      enforceChangePermission();
      Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid()
                  + ", uid=" + Binder.getCallingUid());
      if (DBG) {
          Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n");
      }

      /*
      * Caller might not have WRITE_SECURE_SETTINGS,
      * only CHANGE_WIFI_STATE is enforced
      */

      long ident = Binder.clearCallingIdentity();
      try {
          if (! mSettingsStore.handleWifiToggled(enable)) {
              // Nothing to do if wifi cannot be toggled
              return true;
          }
      } finally {
          Binder.restoreCallingIdentity(ident);
      }

      mWifiController.sendMessage(CMD_WIFI_TOGGLED);
      return true;
  }

the output file is: logsOfAddingNewMethodToAndroid.txt

second: compile new SDK to compile proper applications

useful links to build custom SDKs https://android.googlesource.com/platform/sdk/+/master/docs/howto_build_SDK.txt

page 135 of Embedded Android

useful link for navigating andorid https://www.youtube.com/watch?v=NsqFOSzoYE8

2 chrome extensions sdk reference search --> prefix is ad or ab android resource navigator --> arn

first: I don't have any fucking idea started to search around to find a solution I just thought that I have to force android studio to build the program but that was totally false because if it can not find the framework obviously can't link the function. so I have to add the new SDK to android studio

find three things:

First

a document in google git about how to build custom API that doesn't work for me. https://github.com/miracle2k/android-platform_sdk/blob/master/docs/howto_build_SDK.txt https://android.googlesource.com/platform/sdk/+/master/docs/howto_build_SDK.txt

Second

after that I found how to make custom SDK in page 135 of Embedded Android that was same as the first solution and doesn’t work for me.

Third

after that I found a stack overflow post android - In Androird how to expose a library API in AOSP to 3rd party developers - Stack Overflow

so I use make update-api and after that make sdk in second phase I faced some issues

PS: to open android source code in android studio you could use this link How to import android source code(AOSP) into Android studio? - Stack Overflow and in this video https://www.youtube.com/watch?v=NsqFOSzoYE8 they show how to dive into android source code it could be useful for example two useful #chrome_extensions introduced.

Problems

I got faced two problems that I posted here Android-x86 Google Groups - Error while building SDK because of lack gralloc_drm.h

I want to build custom SDK to do that I run this command first to add new API
make update-api that runs successfully after that I run: make sdk but I faced an error that #include "gralloc_drm.h" not found in the: frameworks/native/services/surfaceflinger/DisplayDevice.cpp I compared code in this file with original AOSP and did not find #include "gralloc_drm.h" in the original code either I did not find the gralloc_drm.h in the appropriate directory. so I removed the included line. but after that I faced this error:

frameworks/native/services/surfaceflinger/DisplayDevice.cpp:263:29: error: use of undeclared identifier 'GRALLOC_MODULE_PERFORM_LEAVE_VT'
            gr->perform(gr, GRALLOC_MODULE_PERFORM_LEAVE_VT);
                            ^
frameworks/native/services/surfaceflinger/DisplayDevice.cpp:268:29: error: use of undeclared identifier 'GRALLOC_MODULE_PERFORM_ENTER_VT'
            gr->perform(gr, GRALLOC_MODULE_PERFORM_ENTER_VT);
                            ^
target  C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
2 errors generated.
build/core/binary.mk:706: recipe for target 'out/target/product/generic_x86/obj/SHARED_LIBRARIES/libsurfaceflinger_intermediates/DisplayDevice.o' failed
make: *** [out/target/product/generic_x86/obj/SHARED_LIBRARIES/libsurfaceflinger_intermediates/DisplayDevice.o] Error 1
make: *** Waiting for unfinished jobs....

make failed to build some targets (02:58 (mm:ss))

that obviously is because of lack of gralloc_drm.h file. I still amazed why gralloc_drm.h is not in the source code while some codes using it.

and I got this answer Mauro Rossi

9:36 PM (1 hour ago)

Hi Mohammad,

the gralloc_drm.h header is in external/drm_gralloc folder,

it is also exported with libgralloc_drm shared library, so you could try to add the following line in the Android.mk of target that is giving you the build error.
LOCAL_SHARED_LIBRARIES += libgralloc_drm

Mauro

so I added this line LOCAL_SHARED_LIBRARIES += libgralloc_drm to /root/android-x86-marshmallow/frameworks/native/services/surfaceflinger/Android.mk and build it again.

after these steps I got this error:

make: *** No rule to make target 'out/target/product/generic_x86/obj/SHARED_LIBRARIES/libgralloc_drm_intermediates/export_includes', needed by 'out/target/product/generic_x86/obj/SHARED_LIBRARIES/libsurfaceflinger_intermediates/import_includes'.  Stop.
make: *** Waiting for unfinished jobs....
Export includes file: frameworks/native/services/surfaceflinger/Android.mk -- out/target/product/generic_x86/obj/SHARED_LIBRARIES/libsurfaceflinger_intermediates/export_includes

#### make failed to build some targets (09:33 (mm:ss)) ####

I changed it and just add the libgralloc_drm like other libraries and it worked as mentioned bellow

LOCAL_SHARED_LIBRARIES := \
    libcutils \
    liblog \
    libdl \
    libhardware \
    libutils \
    libEGL \
    libGLESv1_CM \
    libGLESv2 \
    libbinder \
    libui \
    libgui \
    libpowermanager \
    libgralloc_drm

after compiling it I faced another issue:

prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: out/host/linux-x86/obj32/STATIC_LIBRARIES/libLLVMProfileData_in
termediates/libLLVMProfileData.a(SampleProfWriter.o): previous definition here
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: error: out/host/linux-x86/obj32/STATIC_LIBRARIES/libLLVMProfile
Data_intermediates/libLLVMProfileData.a(SampleProfWriter.o): multiple definition of 'vtable for llvm::sampleprof::SampleProfileWriterText'
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: out/host/linux-x86/obj32/STATIC_LIBRARIES/libLLVMProfileData_in
termediates/libLLVMProfileData.a(SampleProfWriter.o): previous definition here
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: error: out/host/linux-x86/obj32/STATIC_LIBRARIES/libLLVMProfile
Data_intermediates/libLLVMProfileData.a(SampleProfWriter.o): multiple definition of 'vtable for llvm::sampleprof::SampleProfileWriterBinary'
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: out/host/linux-x86/obj32/STATIC_LIBRARIES/libLLVMProfileData_in
termediates/libLLVMProfileData.a(SampleProfWriter.o): previous definition here

clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:51: recipe for target 'out/host/linux-x86/obj32/lib/libLLVM.so' failed
make: *** [out/host/linux-x86/obj32/lib/libLLVM.so] Error 1

#### make failed to build some targets (01:03:57 (hh:mm:ss)) ####

after one more time compiling I got same error as expected:

clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:51: recipe for target 'out/host/linux-x86/obj32/lib/libLLVM.so' failed
make: *** [out/host/linux-x86/obj32/lib/libLLVM.so] Error 1
make: *** Waiting for unfinished jobs....

#### make failed to build some targets (01:43 (mm:ss)) ####

I found this link to resolve this issue: Android build error on Ubuntu 16.04 LTS - Viva La Vida

it seems AOSP codes before May 7 2016 has this issue on Ubuntu 16.04 (my environment) and to resolve it I should change /build/core/clang/HOST_x86_common.mk with a newer one after May 7 2016

and at all in the android source site mentioned that it’s better to use Ubuntu 14.04 to compile the Android-Marshmallow

So I first change this file and if I got problem I change my machine.

so I changed /build/core/clang/HOST_x86_common.mk file with the same file in android nougat-x86 to see the changes.

the new file is HOST_x86_common.mk

after compiling I got exact same error:

clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:51: recipe for target 'out/host/linux-x86/obj32/lib/libLLVM.so' failed
make: *** [out/host/linux-x86/obj32/lib/libLLVM.so] Error 1
make: *** Waiting for unfinished jobs....

#### make failed to build some targets (01:59 (mm:ss)) ####

So I decided to get a 14.04 vps and do all the stuff from the top

here is how I did it:

  1. first got a VPS from AarvanCloud.
  2. add my own ip to route from default gateway because I want to use vpn on my vps and if I don’t do that I lost my connection to my vps
  3. setup a vpn server with steisand effect repository at: https://github.com/StreisandEffect/streisand
  4. run this command on your own vps:
ip route x.x.x.x/24 via [default-gateway]

that x.x.x.x is ip of the computer using to connect to remote host. easily can find your ip by search my ip in Google 5. and run this:

openconnect —cafile ca.crt [server-ip] -u [your-username]
  1. after this start cloning procedure from the first

to establish a build environment on ::Ubuntu 14.04::

  • install openjdk-7-jdk
add-apt-repository ppa:openjdk-r/ppa  
apt-get update   
apt-get install openjdk-7-jdk
  • install requirements:
apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev libgl1-mesa-dev libxml2-utils xsltproc unzip

on ubuntu 16.04 run this:

apt-get install yasm python-pip libyaml-dev bc genisoimage syslinux-utils git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev libgl1-mesa-dev libxml2-utils xsltproc libssl-dev ncurses-dev xz-utils kernel-package unzip
  • install proper pip packages:
pip install prettytable Mako pyaml dateutils

so I setup a 14.04 machine from DigitalOcean

on bare source code run

source build/envsetup.sh
lunch sdk_x86-eng
make -j6 sdk

and I got failed.

so I try other method:

source build/envsetup.sh
lunch sdk_x86-eng
make -j6 update-api
make -j6 PRODUCT-sdk-sdk

that after update-api phase was successful but the last make command failed with the following error:

/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-gcc: No such file or directory
/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-gcc: No such file or directory
make: *** [out/target/product/generic/obj/lib/crtbegin_dynamic1.o] Error 127
make: *** Waiting for unfinished jobs....
make: *** [out/target/product/generic/obj/lib/crtbrand.o] Error 127
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

#### make failed to build some targets (02:00 (mm:ss)) ####

I tried to build sdk with default android-marshmallow AOSP on Ubuntu 14.04 machine and android-x86 simultaneously

Ubuntu 16.04 - android-x86-marshmallow - error

host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/PseudoConstantAnalysis.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ReachableCode.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ScanfFormatString.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ThreadSafetyCommon.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ThreadSafety.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ThreadSafetyLogical.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/ThreadSafetyTIL.cpp
host C++: libclangAnalysis_32 <= external/clang/lib/Analysis/UninitializedValues.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/APValue.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTConsumer.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTContext.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTDiagnostic.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTDumper.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTImporter.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/ASTTypeTraits.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/AttrImpl.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/CommentBriefParser.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/CommentCommandTraits.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/Comment.cpp
host C++: libclangAST_32 <= external/clang/lib/AST/CommentLexer.cpp
clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:51: recipe for target 'out/host/linux-x86/obj32/lib/libLLVM.so' failed
make: *** [out/host/linux-x86/obj32/lib/libLLVM.so] Error 1
make: *** Waiting for unfinished jobs....

#### make failed to build some targets (04:08 (mm:ss)) ####

one useful link makefile - Building Android from sources: unsupported reloc 43 - Stack Overflow I added -no-integrated-as at the end of line 16 of build/core/clang/HOST_x86_common.mk

  ifeq ($(HOST_OS),linux)
  CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS := \
    --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \
    --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
    -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin \
    -no-integrated-as

in this pdf file explains a little about the issue:

<a href='LPC16%20-%20AOSP's%20switch%20to%20Clang(2).pdf'>LPC16%20-%20AOSP's%20switch%20to%20Clang(2).pdf

and nothing has changed on ubuntu 16.04 :sad: I’ve got exactly the same error

compiling SDK on Ubuntu 14.04 on AOSP marshmallow was successful

but on the same machine android-x86-marshmallow got some issues: I do this command:

lunch sdk-eng
make -j6 sdk

and I got this error message

/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-gcc: No such file or directory
make: *** [out/target/product/generic/obj/lib/crtbegin_dynamic1.o] Error 127
make: *** Waiting for unfinished jobs....
/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-gcc: No such file or directory
make: *** [out/target/product/generic/obj/lib/crtbrand.o] Error 127
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

#### make failed to build some targets (01:24 (mm:ss)) ####

from the error it seems that the x86 source don’t have arm based compiler and because of this it failed. I will transfer those file from AOSP to x86 and hope it will work.

before transferring arm files from AOSP to x86 repo I try this command:

lunch sdk_x86-eng
make sdk

to build specifically SDK for x86 machine but I got this error message

/root/android-x86-marshmallow/external/busybox/scripts/basic/split-include.c: In function ‘main’:
/root/android-x86-marshmallow/external/busybox/scripts/basic/split-include.c:134:11: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
      fgets(old_line, buffer_size, fp_target);
           ^
  HOSTCC  scripts/kconfig/conf.o
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/conf.c: In function ‘conf_askvalue’:
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/conf.c:106:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
   fgets(line, 128, stdin);
        ^
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/conf.c: In function ‘conf_choice’:
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/conf.c:354:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
    fgets(line, 128, stdin);
         ^
  HOSTCC  scripts/kconfig/kxgettext.o
  HOSTCC  scripts/kconfig/mconf.o
  SHIPPED scripts/kconfig/zconf.tab.c
  SHIPPED scripts/kconfig/lex.zconf.c
  SHIPPED scripts/kconfig/zconf.hash.c
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/mconf.c: In function ‘show_textbox’:
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/mconf.c:847:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
  write(fd, text, strlen(text));
       ^
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/mconf.c: In function ‘exec_conf’:
/root/android-x86-marshmallow/external/busybox/scripts/kconfig/mconf.c:481:6: warning: ignoring return value of ‘pipe’, declared with attribute warn_unused_result [-Wunused-result]
  pipe(pipefd);
      ^
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
scripts/kconfig/conf -s Config.in
#
# using defaults found in .config
#
  SPLIT   include/autoconf.h -> include/config/*
  HOSTCC  applets/usage
  HOSTCC  applets/applet_tables
/root/android-x86-marshmallow/external/busybox/applets/usage.c: In function ‘main’:
/root/android-x86-marshmallow/external/busybox/applets/usage.c:52:8: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
   write(STDOUT_FILENO, usage_array[i].usage, strlen(usage_array[i].usage) + 1);
        ^
  GEN     include/bbconfigopts.h
/root/android-x86-marshmallow/external/busybox/applets/applet_tables.c: In function ‘main’:
/root/android-x86-marshmallow/external/busybox/applets/applet_tables.c:144:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
    fgets(line_old, sizeof(line_old), fp);
         ^
  GEN     include/usage_compressed.h
  GEN     include/applet_tables.h
  HOSTCC  applets/usage_pod
  CC      applets/applets.o
  LD      applets/built-in.o
make[1]: Leaving directory `/root/android-x86-marshmallow/external/busybox'

#### make failed to build some targets (01:11 (mm:ss)) ####

I am trying to run

lunch sdk_x86-eng
make -j6 sdk

on AOSP source code as mentioned in the Android on X86 book page 55 you can find the book here: https://doc.lagout.org/programmation/Android/Android%20on%20x86_%20An%20Introduction%20to%20Optimizing%20for%20Intel%20Architecture%20%5BKrajci%20%26%20Cummings%202013-12-26%5D.pdf

and it was successful

so I modified all the files in the source code and run:

lunch sdk_x86-eng
make update-api
make sdk

but I got this error:

ERROR: /root/android-marshmallow/frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiServiceImpl.java:116: The type WifiServiceImpl must implement the inherited abstract method IWifiManager.setWifiEnabledWifiEnabled(boolean, String)
make: *** [out/target/common/obj/JAVA_LIBRARIES/wifi-service_intermediates/with-local/classes.dex] Error 41
make: *** Waiting for unfinished jobs....

#### make failed to build some targets (01:19:43 (hh:mm:ss)) ####

so it seems that I add setWifiEnabledWifiEnabled instead of setWifiEnabledWithPassword that this error occurred. after I do grep -ir setWifiEnabledWifiEnabled and found the suspect

frameworks/base/wifi/java/android/net/wifi/IWifiManager.aidl:    boolean setWifiEnabledWifiEnabled(boolean enable, String password);

so I changed it and do make command again.

I can finally build SDK successfully the SDK zip file can be found in /root/android-marshmallow/out/host/linux-x86/sdk/sdk_x86/android-sdk_eng.root_linux-x86.zip

I download the zip file and trying to import it to android-studio on a linux machine because SDK was build for linux systems only and there were no darwin-x86 directory in /root/android-marshmallow/out/host/

I set up an Ubuntu 18.04 machine with android studio installed and transfer the android-sdk_eng.root_linux-x86.zip to it then extract it.

I changed the android-studio SDK path to the new SDK directory. in android-studio File -> Project Structure -> SDK Location change the path of SDK location to the downloaded SDK.

::Note: images may be look like the procedure have be done on a Mac computer but I tried all the steps on a Ubuntu 18.04 machine and the screen shots are just for better understanding.::

after this changes still nothing good happens and the WifiManager.setWifiEnabledWithPassword(boolean enabled, String password) is unknown to android-studio.

you should change the
File -> Project Structure in Modules pane. go to app and change the Compile Sdk Version to API 23: Android 6.0 (Marshmallow)

after this step WifiManager.setWifiEnabledWithPassword(boolean enabled, String password) will be known to android-studio finally but something else happens and R.id.s_wifi_status become unknown to android-studio with this error:

Error:(50, 38) error: reference to findViewById is ambiguous
both method findViewById(int) in Activity and method <T>findViewById(int) in AppCompatActivity match
where T is a type-variable:
T extends View declared in method <T>findViewById(int)

in this line:

mWifiStatusSwitch = (Switch) findViewById(R.id.s_wifi_status);

as shown in the image.

I just create new project using custom marshmallow SDK but after compiling the application I got this errors:

/Users/mohammad/.gradle/caches/transforms-1/files-1.1/design-26.1.0.aar/20243a57aeaaed99bf35971df2337c59/res/values-v26/values-v26.xml
Error:(3, 5) error: style attribute 'android:attr/keyboardNavigationCluster' not found.

/Users/mohammad/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/74c0b00c055dfbc0e4f01f66ee7315f4/res/values-v26/values-v26.xml
Error:(9, 5) error: resource android:attr/colorError not found.
Error:(13, 5) error: resource android:attr/colorError not found.
Error:(17, 5) error: style attribute 'android:attr/keyboardNavigationCluster' not found.


/Users/mohammad/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/74c0b00c055dfbc0e4f01f66ee7315f4/res/values/values.xml
Error:(246, 5) error: resource android:attr/keyboardNavigationCluster not found.


Error:resource android:style/TextAppearance.Material.Widget.Button.Borderless.Colored not found.
Error:resource android:style/TextAppearance.Material.Widget.Button.Colored not found.

/Users/mohammad/Projects/AndroidProjects/WifiChanger/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values-v26/values-v26.xml
Error:(7) resource android:attr/colorError not found.
Error:(11) resource android:attr/colorError not found.
Error:(15) style attribute 'android:attr/keyboardNavigationCluster' not found.
Error:(18) style attribute 'android:attr/keyboardNavigationCluster' not found.


/Users/mohammad/Projects/AndroidProjects/WifiChanger/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml
Error:(197) resource android:attr/keyboardNavigationCluster not found.

Error:failed linking references.
Error:java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
Error:java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
Error:com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
Error:Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt

Information:BUILD FAILED in 1s

find this link: Configure eclipse to use my own Android SDK (framework.jar) - Stack Overflow

Error:A problem occurred configuring project ':app'.
> Failed to find Build Tools revision 26.0.2

So here is a brief explanation of what I did:

after changing the sdk directory I thought maybe gradle script is problem. I using android marshmallow with API version 23 but gradle insists to use api ver 26 so I headed to change my gradle script to force it to use api ver 23

here is my first gradle script

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.wifichangerfour"
        minSdkVersion 23
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.0.0-beta1'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

android - How to downgrade to older version of Gradle - Stack Overflow

so I change compileSdkVersion and targerSdkVersion from 26 to 23.

and as this link mentioned I should change the implementation scripts as well.

it seems that the problem is because of android sdk version

I’ve got too many problems to import compiled SDKs to android-studio after above bugs I thought maybe I can handle the bugs in gradle.build script.

Gradle

Gradle is a build tool for java projects that android-studio use it too. there are three major things in build script:

  • targetSdkVersion
  • minSdkVersion
  • buildToolsVersion
  • support library the three options : targetSdkVersion and buildToolsVersion and support library version should be same as each others.

targetSdkVersion and minSdkVersion

these two options in build.gradle script determine the version of sdk that we want to compile out application. the targetSdkVersion is the target sdk that we want to compile application with it and the minSdkVersion is the minimum sdk level that we want to out application be compatible with it.

buildToolsVersion

build tool is building tools that gradle use to build your application and version of it should be same as targetSdkVersion

Support library

something to support older libraries

I just compiled android oreo sdk and import it to android-studio set the every three major thing to 27 as shown in bellow gradle script

apply plugin: 'com.android.application'

android {
    buildToolsVersion "27.0.1"
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.wifichangerseventh"
        minSdkVersion 27
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

but I’ve got new error

Error:java.util.concurrent.ExecutionException: java.lang.RuntimeException: No server to serve request. Check logs for details.
Error:Execution failed for task ':app:mergeDebugResources'.
> Error: java.util.concurrent.ExecutionException: java.lang.RuntimeException: No server to serve request. Check logs for details.

so I’ve done that on the Ubuntu machine

and got this error

Gradle build daemon disappeared unexpectedly (it may have been killed or may have crashed)

Compile Android with feature

Install: out/target/product/x86_64/system/bin/rild
target Pack Relocations: gralloc.drm_32 (out/target/product/x86_64/obj_x86/SHARED_LIBRARIES/gralloc.drm_intermediates/PACKED/gralloc.drm.so)
INFO: Compaction                 : 0 bytes
INFO: Too few relocations to pack after alignment
target Pack Relocations: hwcomposer.drm_32 (out/target/product/x86_64/obj_x86/SHARED_LIBRARIES/hwcomposer.drm_intermediates/PACKED/hwcomposer.drm.so)
INFO: Compaction                 : 0 bytes
INFO: Too few relocations to pack after alignment
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1453: error: cannot find symbol
    public static final Uri BASE_CONTENT_URI = Uri.parse("content://" + AUTHORITY);
                                               ^ 
symbol:   variable Uri
  location: class ManagerContract
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1516: error: cannot find symbol
            Cursor passwordRecord = getContentResolver()
            ^
  symbol:   class Cursor
  location: class WifiManager
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1521: error: cannot find symbol
                            ManagerContract.PasswordManagerEntry._ID);
                                                                ^
  symbol:   variable _ID
  location: class PasswordManagerEntry
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1516: error: cannot find symbol
            Cursor passwordRecord = getContentResolver()
                                    ^
  symbol:   method getContentResolver()
  location: class WifiManager
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1527: error: cannot find symbol
            if (password.isEqual(resourcePassword)) {
                        ^
  symbol:   method isEqual(String)
  location: variable password of type String
target Unpacked: gralloc.drm (out/target/product/x86_64/obj/SHARED_LIBRARIES/gralloc.drm_intermediates/PACKED/gralloc.drm.so)
target Unpacked: hwcomposer.drm (out/target/product/x86_64/obj/SHARED_LIBRARIES/hwcomposer.drm_intermediates/PACKED/hwcomposer.drm.so)
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
8 errors
target Unpacked: libgui (out/target/product/x86_64/obj/SHARED_LIBRARIES/libgui_intermediates/PACKED/libgui.so)
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1453: Uri cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1453: Uri cannot be resolved
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1457: BaseColumns cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1459: Uri cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1460: Uri cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1516: Cursor cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1516: The method getContentResolver() is undefined for the type WifiManager
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1517: Uri cannot be resolved to a type
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1521: _ID cannot be resolved or is not a field
ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1527: The method isEqual(String) is undefined for the type String
build/core/java.mk:394: recipe for target 'out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes-full-debug.jar' failed
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes-full-debug.jar] Error 41
make: *** Waiting for unfinished jobs....
build/core/java.mk:643: recipe for target 'out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex' failed
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex] Error 41

#### make failed to build some targets (11:15 (mm:ss)) ####

root@androidbuilder:~/android-x86-marshmallow#

after adding new code to android source code and resolve errors I got an error that need special acts to resolve

ERROR: /root/android-x86-marshmallow/frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1519: The method getContentResolver() is undefined for the type WifiManager
build/core/java.mk:643: recipe for target 'out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex' failed
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex] Error 41
make: *** Waiting for unfinished jobs....
frameworks/base/wifi/java/android/net/wifi/WifiManager.java:1519: error: cannot find symbol
            Cursor passwordRecord = getContentResolver()
                                    ^
  symbol:   method getContentResolver()
  location: class WifiManager
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
build/core/java.mk:394: recipe for target 'out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes-full-debug.jar' failed
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes-full-debug.jar] Error 41

#### make failed to build some targets (03:00 (mm:ss)) ####

method getContentResolver from Context class could not resolved in framework although Context class was added to source code and I can use it in android studio. so let’s go to find the problem

vim core/java/com/android/internal/widget/RotarySelector.java

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My experience to build a custom Android SDK for a manipulated Android with new functions.

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