Android 录屏操作

本文主要介绍android中如何通过MediaRecorder实现录屏操作的.

1: 申请权限

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

以上是录音以及存储的权限,另外需要动态申请录屏的权限.

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
    service = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
    Intent screenCaptureIntent = service.createScreenCaptureIntent();
    startActivityForResult(screenCaptureIntent, 1001);
}

如上操作,点击后会弹出提示:

在这里插入图片描述

点击立即开始即可.

2: 获取MediaProjection

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 1001 && resultCode == RESULT_OK) {
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            mediaProjection = service.getMediaProjection(resultCode, data);
        }
        Toast.makeText(this, "申请权限成功", Toast.LENGTH_SHORT).show();
    }
}

3: 创建MediaRecorder

创建mediarRecorder实例,设置相关参数.

mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mediaRecorder.setOutputFile("sdcard/test.mp4");
mediaRecorder.setVideoSize(1920, 2560);
mediaRecorder.setVideoFrameRate(90);

4: 创建VirtualDisplay并开始录制

VirtualDisplay 通过mediaProjection关联创建.

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
    try {
        mediaRecorder.prepare();
        isRecording = true;
    } catch (IOException e) {
        e.printStackTrace();
    }
    Surface surface = mediaRecorder.getSurface();
    virtualDisplay = mediaProjection.createVirtualDisplay("ScreenRecording", 1920, 2560, 60,
            DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, surface, null, null);
    mediaRecorder.start();
   
}

5: 结束录制

private void stopRecord() {
    if (mediaRecorder != null) {
        mediaRecorder.stop();
        mediaRecorder.release();
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        if (virtualDisplay!=null) virtualDisplay.release();
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        if (mediaProjection != null) mediaProjection.stop();
    }
}