Android 录屏操作-编程知识

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();}
}