前言

这次不是需求了，这次是个人兴趣爱好。个人比较喜欢音视频方面的东西，还有就是有时候需要录屏去制作GIF图，所以就花时间去试着自己写一个简单的录屏小程序自用了。

经过一段时间的尝试，算是弄出来了一个能用的录屏小程序。

老规矩，先上图。

这里使用的是MediaProjectionManager、MediaProjection、VirtualDisplay,所以API级别最低支持到21。还有就是我的targetSdkVersion是22，这里我是偷懒了，避免了权限申请那一步。

public class ScreenRecorderActivity extends AppCompatActivity {

public static final String TAG = "ez";

private static final int DISPLAY_WIDTH = 720;

private static final int DISPLAY_HEIGHT = 1280;

private static final int RECORD_REQUEST_CODE = 100;

private int mScreenDensity;

private Button mBtnRecorder;

boolean isRecording = false;

private MediaRecorder mMediaRecorder;

private VirtualDisplay mVirtualDisplay;

private MediaProjection mMediaProjection;

private MediaProjectionManager mProjectionManager;

private MediaProjectionCallback mMediaProjectionCallback;

private static final SparseIntArray ORIENTTIONS = new SparseIntArray();

static {

ORIENTTIONS.append(Surface.ROTATION_0, 90);

ORIENTTIONS.append(Surface.ROTATION_90, 0);

ORIENTTIONS.append(Surface.ROTATION_180, 270);

ORIENTTIONS.append(Surface.ROTATION_270, 180);

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_screen_recorder_layout);

DisplayMetrics metrics = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(metrics);

mScreenDensity = metrics.densityDpi;

mMediaRecorder = new MediaRecorder();

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

mBtnRecorder = (Button) findViewById(R.id.id_btn_screen_recorder);

mBtnRecorder.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

isStartRecordScreen();

}

});

}

//是否开启录制

private void isStartRecordScreen() {

if (!isRecording) {

initRecorder();

recordScreen();

} else {

mMediaRecorder.stop();

mMediaRecorder.reset();

stopRecordScreen();

}

}

//初始化录制参数

private void initRecorder() {

try {

if (mMediaRecorder == null) {

Log.d(TAG, "initRecorder: MediaRecorder为空啊---");

return;

}

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 音频源

mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);// 视频源

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);//视频输出格式

//这里的路径我是直接写死了。。。

mMediaRecorder.setOutputFile("/storage/emulated/0/ScreenRecorder/" + System.currentTimeMillis() + ".mp4");//存储路径

mMediaRecorder.setVideoSize(DISPLAY_WIDTH, DISPLAY_HEIGHT);// 设置分辨率

mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);// 视频录制格式

mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);// 音频格式

mMediaRecorder.setVideoFrameRate(16);//帧率

mMediaRecorder.setVideoEncodingBitRate(5242880);//视频清晰度

int rotation = getWindowManager().getDefaultDisplay().getRotation();

int orientataion = ORIENTTIONS.get(rotation + 90);

mMediaRecorder.setOrientationHint(orientataion);//设置旋转方向

mMediaRecorder.prepare();

} catch (IOException e) {

e.printStackTrace();

}

}

//开始录制

private void recordScreen() {

if (mMediaProjection == null) {

startActivityForResult(mProjectionManager.createScreenCaptureIntent(), RECORD_REQUEST_CODE);

return;

}

mVirtualDisplay = createVirtualDisplay();

mMediaRecorder.start();

isRecording = true;

changeText();

}

//停止录制

private void stopRecordScreen() {

if (mVirtualDisplay == null) {

return;

}

mVirtualDisplay.release();

destroyMediaProjection();

isRecording = false;

changeText();

}

//释放录制的资源

private void destroyMediaProjection() {

if (mMediaProjection != null) {

mMediaProjection.unregisterCallback(mMediaProjectionCallback);

mMediaProjection.stop();

mMediaProjection = null;

}

}

private VirtualDisplay createVirtualDisplay() {

return mMediaProjection.createVirtualDisplay("ScreenRecorder", DISPLAY_WIDTH, DISPLAY_HEIGHT, mScreenDensity,

DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mMediaRecorder.getSurface(), null, null);

}

private void changeText() {

if (isRecording) {

mBtnRecorder.setText("停止录屏");

} else {

mBtnRecorder.setText("开始录屏");

}

}

//录制回调

private class MediaProjectionCallback extends MediaProjection.Callback {

@Override

public void onStop() {

if (isRecording) {

isRecording = false;

changeText();

mMediaRecorder.stop();

mMediaRecorder.reset();

}

mMediaProjection = null;

stopRecordScreen();

}

}

@Override

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

super.onActivityResult(requestCode, resultCode, data);

if (requestCode == RECORD_REQUEST_CODE) {

if (resultCode != RESULT_OK) {

Toast.makeText(ScreenRecorderActivity.this, "录屏权限被禁止了啊", Toast.LENGTH_SHORT).show();

isRecording = false;

changeText();

return;

}

mMediaProjectionCallback = new MediaProjectionCallback();

mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data);

mMediaProjection.registerCallback(mMediaProjectionCallback, null);

mVirtualDisplay = createVirtualDisplay();

mMediaRecorder.start();

isRecording = true;

changeText();

}

}

//停止录制时，释放资源

@Override

protected void onStop() {

super.onStop();

destroyMediaProjection();

}

@Override

public void onBackPressed() {

if (isRecording) {

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("确定停止录屏吗？")

.setPositiveButton("停止", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

mMediaRecorder.stop();

mMediaRecorder.reset();

stopRecordScreen();

finish();

}

}).setNegativeButton("继续录吧", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

}

}).create().show();

} else {

finish();

}

}

}

需要的权限：

更多参数的设置请自行尝试，方法参数解释请点击这里

最后的最后，

祝大家元宵节快乐