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：
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
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，
