h264的android屏幕共享,android通过MediaProjectionManager录屏关联MediaCodec获取h264数据

是的，您可以使用Android的MediaProjectionManager API来获取屏幕捕获的权限，然后使用MediaCodec API将捕获的屏幕数据编码为H.264格式。具体步骤如下：

1. 创建一个MediaProjectionManager对象并请求屏幕捕获的权限：

MediaProjectionManager mediaProjectionManager =
    (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);

Intent permissionIntent = mediaProjectionManager.createScreenCaptureIntent();
startActivityForResult(permissionIntent, REQUEST_CODE);

2. 在onActivityResult()方法中获取MediaProjection对象：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE) {
        if (resultCode != Activity.RESULT_OK) {
            // 用户拒绝了屏幕共享请求
            return;
        }

        // 获取MediaProjection对象
        MediaProjection mediaProjection =
            mediaProjectionManager.getMediaProjection(resultCode, data);
    }
}

3. 创建一个MediaCodec对象并配置编码器：

MediaFormat format = MediaFormat.createVideoFormat("video/avc", width, height);
format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate);
format.setInteger(MediaFormat.KEY_FRAME_RATE, frameRate);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval);

MediaCodec codec = MediaCodec.createEncoderByType("video/avc");
codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
codec.start();

4. 在屏幕捕获回调中获取屏幕数据，并将数据编码后写入到输出流：

class ScreenCaptureCallback extends MediaProjection.Callback {
    private Surface surface;
    private MediaCodec codec;

    public ScreenCaptureCallback(Surface surface, MediaCodec codec) {
        this.surface = surface;
        this.codec = codec;
    }

    @Override
    public void onStop() {
        codec.stop();
        codec.release();
    }

    @Override
    public void onScreenCaptureStarted(MediaProjection projection) {
        // 创建一个虚拟屏幕Surface
        DisplayManager displayManager =
            (DisplayManager) getSystemService(Context.DISPLAY_SERVICE);
        Display display = displayManager.getDisplay(Display.DEFAULT_DISPLAY);
        VirtualDisplay virtualDisplay = mediaProjection.createVirtualDisplay(
            "ScreenCapture", width, height, dpi, DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY,
            surface, null, null);

        // 开始屏幕捕获
        codec.setCallback(new MediaCodec.Callback() {
            @Override
            public void onInputBufferAvailable(MediaCodec codec, int index) {
                // do nothing
            }

            @Override
            public void onOutputBufferAvailable(MediaCodec codec, int index, MediaCodec.BufferInfo info) {
                ByteBuffer buffer = codec.getOutputBuffer(index);
                // 将编码后的数据写入到输出流
                outputStream.write(buffer.array(), info.offset, info.size);

                codec.releaseOutputBuffer(index, false);
            }

            @Override
            public void onError(MediaCodec codec, MediaCodec.CodecException e) {
                // do nothing
            }

            @Override
            public void onOutputFormatChanged(MediaCodec codec, MediaFormat format) {
                // do nothing
            }
        });

        codec.getInputBuffers();
    }
}

注意：需要在AndroidManifest.xml文件中添加录屏权限：

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL" />
<uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />