如何在Android视频通话demo中实现视频通话屏幕分享？
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```
4. 添加以下依赖项到项目的`build.gradle`文件中：
```groovy
dependencies {
implementation 'com.google.android.gms:play-services-vision:20.1.3'
implementation 'com.google.android.gms:play-services-tasks:12.0.1'
implementation 'com.google.android.gms:play-services-auth:19.0.1'
implementation 'com.google.android.gms:play-services-base:17.0.1'
implementation 'com.google.android.gms:play-services-auth-api-phone:17.0.1'
}
```
二、实现视频通话屏幕分享
1. 创建一个名为`ScreenShareActivity`的新Activity，用于实现屏幕分享功能。
```java
public class ScreenShareActivity extends AppCompatActivity {
private ScreenCaptureManager screenCaptureManager;
private SurfaceView surfaceView;
private TextureView textureView;
private Camera2CameraDevice cameraDevice;
private CameraCaptureSession cameraCaptureSession;
private CaptureRequest.Builder captureRequestBuilder;
private HandlerThread backgroundThread;
private Handler backgroundHandler;
private Handler mainHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_screen_share);
surfaceView = findViewById(R.id.surface_view);
textureView = findViewById(R.id.texture_view);
screenCaptureManager = new ScreenCaptureManager(this);
mainHandler = new Handler(Looper.getMainLooper());
backgroundThread = new HandlerThread("CameraBackground");
backgroundThread.start();
backgroundHandler = new Handler(backgroundThread.getLooper());
startScreenCapture();
}
private void startScreenCapture() {
if (screenCaptureManager.isScreenCaptureEnabled()) {
// 检查是否已启用屏幕捕获
screenCaptureManager.startScreenCapture(surfaceView);
} else {
// 启用屏幕捕获
screenCaptureManager.requestScreenCapture(new ScreenCaptureManager.ScreenCaptureCallback() {
@Override
public void onScreenCaptureEnabled() {
// 启用屏幕捕获后，开始屏幕分享
screenCaptureManager.startScreenCapture(surfaceView);
}
@Override
public void onScreenCaptureDisabled() {
// 禁用屏幕捕获
finish();
}
});
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (screenCaptureManager.isScreenCaptureEnabled()) {
// 停止屏幕分享
screenCaptureManager.stopScreenCapture();
}
backgroundThread.quitSafely();
try {
backgroundThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
```
2. 在`activity_screen_share.xml`布局文件中，添加以下内容：
```xml
```
3. 在`MainActivity`中，添加以下代码，用于启动`ScreenShareActivity`：
```java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = findViewById(R.id/button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, ScreenShareActivity.class);
startActivity(intent);
}
});
}
}
```
4. 运行应用，点击按钮，即可启动屏幕分享功能。
三、总结
本文详细介绍了在Android视频通话demo中实现视频通话屏幕分享功能的方法。通过使用`ScreenCaptureManager`类，我们可以轻松实现屏幕捕获和分享。在实际开发过程中，您可以根据需求对代码进行修改和优化。