webRTC（二十），Android面试题集2024版

mImageReader = ImageReader.newInstance(UIUtils.getScreenWidth(this),

UIUtils.getScreenHeight(this),

PixelFormat.RGBA_8888,

1);

• 打开系统截屏权限

projectionManager = (MediaProjectionManager) getSystemService(MEDIA_PROJECTION_SERVICE);

Intent captureIntent = projectionManager.createScreenCaptureIntent();

startActivityForResult(captureIntent, REQUEST_CODE);

• 得到返回数据

@Override

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {

mediaProjection = projectionManager.getMediaProjection(resultCode, data);

mVirtualDisplay = createVirtualDisplay();

new Thread(new Runnable() {

@Override

public void run() {

//这里需要暂停100ms 否则获取不到Bitmap对象