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要获取Android设备屏幕的显示内容,可以使用Android的MediaProjection API。以下是一个简单的示例代码:
- 首先,在AndroidManifest.xml文件中添加以下权限:
<uses-permission android:name="android.permission.READ_FRAME_BUFFER"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
- 创建一个新的Activity,并在其onCreate方法中添加以下代码:
private static final int REQUEST_CODE_MEDIA_PROJECTION = 1; private MediaProjectionManager mMediaProjectionManager; private MediaProjection mMediaProjection; private VirtualDisplay mVirtualDisplay; private ImageReader mImageReader; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mMediaProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE); startActivityForResult(mMediaProjectionManager.createScreenCaptureIntent(), REQUEST_CODE_MEDIA_PROJECTION); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_CODE_MEDIA_PROJECTION) { if (resultCode == RESULT_OK) { mMediaProjection = mMediaProjectionManager.getMediaProjection(resultCode, data); // 获取屏幕的宽度和高度 DisplayMetrics metrics = getResources().getDisplayMetrics(); int width = metrics.widthPixels; int height = metrics.heightPixels; // 创建一个ImageReader对象,用于捕捉屏幕内容 mImageReader = ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, 2); mVirtualDisplay = mMediaProjection.createVirtualDisplay("ScreenCapture", width, height, metrics.densityDpi, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mImageReader.getSurface(), null, null); } } }
- 在需要获取屏幕显示内容的地方,添加以下代码:
Image image = mImageReader.acquireLatestImage(); if (image != null) { // 处理屏幕内容 // ... // 释放Image资源 image.close(); }
请注意,使用MediaProjection API需要用户授权,因此需要在Activity中调用startActivityForResult方法来获取用户的授权。授权成功后,可以通过ImageReader对象获取屏幕的内容。