模板版本:v0.2.2
[!TIP] Github 地址
请到三方库的 Releases 发布地址查看配套的版本信息:@react-native-oh-tpl/react-native-thumbnail Releases 。对于未发布到npm的旧版本,请参考安装指南安装tgz包。
进入到工程目录并输入以下命令:
npm install @react-native-oh-tpl/react-native-thumbnail
yarn add @react-native-oh-tpl/react-native-thumbnail
下面的代码展示了这个库的基本使用场景:
[!WARNING] 使用时 import 的库名不变。
[!TIP] 本示例依赖 react-native-image-picker 库,参照@react-native-oh-tpl/react-native-image-picker 文档进行引入。
import React from 'react';
import { StyleSheet, Text, View, TouchableOpacity, Image } from 'react-native';
import { launchCamera, launchImageLibrary } from 'react-native-image-picker';
import RNThumbnail from 'react-native-thumbnail';
export default function ThumbnailExample() {
const [thumbnail, setThumbnail] = React.useState(null);
const openCamera = async () => {
try {
const options = {
mediaType: 'video',
saveToPhotos: true,
includeExtra: false,
durationLimit: 5,
};
console.log('Launching camera with options:', options);
const result = await launchCamera(options);
console.log('Camera result:', result);
if (result.didCancel) {
console.log('User cancelled camera');
} else if (result.errorCode === 'permission') {
console.log('Permission not granted for camera.');
} else if (result.errorCode === 'camera_unavailable') {
console.log('Camera not available on device.');
} else if (result.errorCode === 'others') {
console.log(`Other error: ${result.errorMessage}`);
} else {
// 检查是否成功获取到视频
if (result && result.assets && result.assets.length > 0) {
const asset = result.assets[0];
if (asset.type.includes('mp4')) {
console.log('Received video from camera. Getting thumbnail.');
const thumbnailResult = await RNThumbnail.get(asset.uri);
console.log('Thumbnail result:', thumbnailResult);
setThumbnail(thumbnailResult.path);
} else {
console.log('Gallery asset.type:', asset.type);
}
} else {
console.log('No video selected or other issue occurred.');
}
}
} catch (error) {
console.log('Error launching camera: ', error);
}
};
const openGallery = async () => {
try {
const options = {
mediaType: 'video', // 修改为只选择视频
selectionLimit: 1,
includeExtra: false,
};
console.log('Launching gallery with options:', options);
const result = await launchImageLibrary(options);
if (result.didCancel) {
console.log('User cancelled gallery');
} else if (result.errorCode === 'permission') {
console.log('Permission not granted for gallery.');
} else if (result.errorCode === 'others') {
console.log(`Other error: ${result.errorMessage}`);
} else {
if (result && result.assets && result.assets.length > 0) {
const asset = result.assets[0];
// Check if type is defined
if (asset.type === undefined) {
console.log('Asset type is undefined.');
}
if (asset.type.includes('mp4')) {
console.log('Received video from gallery. Getting thumbnail.');
const thumbnailResult = await RNThumbnail.get(asset.uri);
console.log('Thumbnail result:', thumbnailResult);
setThumbnail(thumbnailResult.path);
} else {
console.log('Gallery asset.type:', asset.type);
}
}
}
} catch (error) {
console.log('Error launching gallery: ', error);
}
};
return (
<View style={styles.container}>
<TouchableOpacity onPress={openCamera}>
<Text>Open Camera1</Text>
</TouchableOpacity>
<TouchableOpacity onPress={openGallery}>
<Text>Open Gallery1</Text>
</TouchableOpacity>
{thumbnail? (
<Image style={{ width: 200, height: 200, borderWidth: 1, borderColor: 'black' }} source={{ isStatic: true, uri: thumbnail }} />
) : null}
</View>
);
}
const styles = StyleSheet.create({
container: {
width: '100%',
height: '100%',
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
本库已经适配了 Codegen
,在使用前需要主动执行生成三方库桥接代码,详细请参考 Codegen 使用文档。
目前 HarmonyOS 暂不支持 AutoLink,所以 Link 步骤需要手动配置。
首先需要使用 DevEco Studio 打开项目里的 HarmonyOS 工程 harmony
{
...
"overrides": {
"@rnoh/react-native-openharmony" : "./react_native_openharmony"
}
}
目前有两种方法:
- 通过 har 包引入(在 IDE 完善相关功能后该方法会被遗弃,目前首选此方法);
- 直接链接源码。
方法一:通过 har 包引入(推荐)
[!TIP] har 包位于三方库安装路径的
harmony
文件夹下。
打开 entry/oh-package.json5
,添加以下依赖
"dependencies": {
"@rnoh/react-native-openharmony": "file:../react_native_openharmony",
"@react-native-oh-tpl/react-native-thumbnail": "file:../../node_modules/@react-native-oh-tpl/react-native-thumbnail/harmony/thumbnail.har"
}
点击右上角的 sync
按钮
或者在终端执行:
cd entry
ohpm install
方法二:直接链接源码
[!TIP] 如需使用直接链接源码,请参考直接链接源码说明
打开 entry/src/main/ets/RNPackagesFactory.ts
,添加:
import { RNPackageContext, RNPackage } from '@rnoh/react-native-openharmony/ts';
+import { RNThumbnailPackage } from '@react-native-oh-tpl/react-native-thumbnail/ts';
export function createRNPackages(ctx: RNPackageContext): RNPackage[] {
return [
+ new RNThumbnailPackage(ctx),
];
}
点击右上角的 sync
按钮
或者在终端执行:
cd entry
ohpm install
然后编译、运行即可。
要使用此库,需要使用正确的 React-Native 和 RNOH 版本。另外,还需要使用配套的 DevEco Studio 和 手机 ROM。
请到三方库相应的 Releases 发布地址查看 Release 配套的版本信息:react-native-thumbnail Releases
[!TIP] "Platform"列表示该属性在原三方库上支持的平台。
[!TIP] "HarmonyOS Support"列为 yes 表示 HarmonyOS 平台支持该属性;no 则表示不支持;partially 表示部分支持。使用方法跨平台一致,效果对标 iOS 或 Android 的效果。
Name | Description | Type | Required | Platform | HarmonyOS Support |
---|---|---|---|---|---|
get | Generates a thumbnail for a video file. | function | no | All | yes |
本项目基于 The MIT License (MIT) ,请自由地享受和参与开源。