android视频截屏&手机录屏实现代码

本文介绍了android视频截屏&手机录屏实现代码，分享给大家，希望对大家有帮助

问题

在android中有时候我们需要对屏幕进行截屏操作，单一的截屏操作好解决可以通过activity的顶层view DecorView获取一个bitmap，得到就是当前activity上面的全部视图。

 View view = activity.getWindow().getDecorView();    view.setDrawingCacheEnabled(true);    view.buildDrawingCache();    Bitmap bmp = view.getDrawingCache();    DisplayMetrics dm = new DisplayMetrics();    activity.getWindowManager().getDefaultDisplay().getMetrics(dm);    Bitmap ret = Bitmap.createBitmap(bmp, 0, 0, dm.widthPixels, dm.heightPixels);    view.destroyDrawingCache();

如果activity中包含一些视频播放器比如SurfaceView GLSurfaceView TextureView，在调用截屏代码会发现播放视频的部分是黑屏的，原因是这几种视频渲染的view通过以上代码拿到的是缓冲区不是真正的图像。

解决办法

android5.0以上系统提供了一个 MediaProjectionManager类来对手机进行录屏操作，也支持获取手机的Image图像的操作，知道了这些我们就可以通过提供的api来进行截屏操作了。

这里通过Service来操作截屏和录屏的api

1.绑定截屏的Service

 Intent intent = new Intent(this, ScreenService.class); bindService(intent, mServiceConnection, BIND_AUTO_CREATE); public void onServiceConnected(ComponentName className, IBinder service) {       DisplayMetrics metrics = new DisplayMetrics();       getWindowManager().getDefaultDisplay().getMetrics(metrics);       ScreenService.RecordBinder binder = (ScreenService.RecordBinder) service;       recordService = binder.getRecordService();       recordService.setConfig(metrics.widthPixels, metrics.heightPixels, metrics.densityDpi);       mButton.setEnabled(true);       mButton.setText(recordService.isRunning() ? "结束" : "开始"); }

2.请求权限 onActivityResult 方法中回调。

 Intent captureIntent = projectionManager.createScreenCaptureIntent(); startActivityForResult(captureIntent, RECORD_REQUEST_CODE);

android视频截屏&手机录屏实现代码_第1张图片

成功后

 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {     if (requestCode == RECORD_REQUEST_CODE && resultCode == RESULT_OK) {       //######## 截屏逻辑 ########       mediaProjection = projectionManager.getMediaProjection(resultCode, data);       recordService.setMediaProject(mediaProjection);       recordService.initImageReader();     } }

3. 获取截屏

 @Override public void onClick(View view) {  //######## 截屏逻辑 ########   Bitmap bitmap = recordService.getBitmap();   mImageView.setImageBitmap(bitmap); }

android视频截屏&手机录屏实现代码_第2张图片

录屏

录屏需要初始化一些录屏参数，输入麦克风类型视频类型，保存路径等

 private void initRecorder() {     mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);     mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);     mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);     mediaRecorder.setOutputFile(         getSavePath() + System.currentTimeMillis() + ".mp4");     mediaRecorder.setVideoSize(width, height);     mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);     mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);     mediaRecorder.setVideoEncodingBitRate(5 * 1024 * 1024);     mediaRecorder.setVideoFrameRate(30);     try {       mediaRecorder.prepare();     } catch (IOException e) {       e.printStackTrace();     } }

开始录屏

mediaRecorder.start();

保存路径

android视频截屏&手机录屏实现代码_第3张图片

完整Service代码

public class ScreenService extends Service {private MediaRecorder mediaRecorder;private VirtualDisplay virtualDisplay;private boolean running;private int width = 720;private int height = 1080;private int dpi;private ImageReader mImageReader;private MediaProjection mediaProjection; @Override public IBinder onBind(Intent intent) {   return new RecordBinder(); } @Override public void onCreate() {   super.onCreate();   running = false;   mediaRecorder = new MediaRecorder(); } @Override public int onStartCommand(Intent intent, int flags, int startId) {   return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() {   super.onDestroy(); } public void setMediaProject(MediaProjection project) {   mediaProjection = project; } public boolean isRunning() {   return running; } public void setConfig(int width, int height, int dpi) {   this.width = width;   this.height = height;   this.dpi = dpi; } /** * 开始录屏 * * @return true */ public boolean startRecord() {   if (mediaProjection == null || running) {     return false;   }   initRecorder();   createVirtualDisplay();   mediaRecorder.start();   running = true;   return true; } /** * 结束录屏 * * @return true */ public boolean stopRecord() {   if (!running) {     return false;   }   running = false;   mediaRecorder.stop();   mediaRecorder.reset();   virtualDisplay.release();   mediaProjection.stop();   return true; } public void setMediaProjection(MediaProjection mediaProjection) {   this.mediaProjection = mediaProjection; } /** * 初始化ImageRead参数 */ public void initImageReader() {   if (mImageReader == null) {     int maxImages = 2;     mImageReader = ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, maxImages);     createImageVirtualDisplay();   } } /** * 创建一个录屏 Virtual */ private void createVirtualDisplay() {   virtualDisplay = mediaProjection       .createVirtualDisplay("mediaprojection", width, height, dpi, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mediaRecorder           .getSurface(), null, null); } /** * 创建一个ImageReader Virtual */ private void createImageVirtualDisplay() {   virtualDisplay = mediaProjection       .createVirtualDisplay("mediaprojection", width, height, dpi,           DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mImageReader           .getSurface(), null, null); } /** * 初始化保存屏幕录像的参数 */ private void initRecorder() {   mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);   mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);   mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);   mediaRecorder.setOutputFile(       getSavePath() + System.currentTimeMillis() + ".mp4");   mediaRecorder.setVideoSize(width, height);   mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);   mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);   mediaRecorder.setVideoEncodingBitRate(5 * 1024 * 1024);   mediaRecorder.setVideoFrameRate(30);   try {     mediaRecorder.prepare();   } catch (IOException e) {     e.printStackTrace();   } } /** * 获取一个保存屏幕录像的路径 * * @return path */ public String getSavePath() {   if (Environment.getExternalStorageState()          .equals(Environment.MEDIA_MOUNTED)) {     String rootDir = Environment.getExternalStorageDirectory()                   .getAbsolutePath() + "/" +         "ScreenRecord" + "/";     File file = new File(rootDir);     if (!file.exists()) {       if (!file.mkdirs()) {         return null;       }     }     return rootDir;   } else {     return null;   } } /** * 请求完权限后马上获取有可能为null，可以通过判断is null来重复获取。 */ public Bitmap getBitmap() {   Bitmap bitmap = cutoutFrame();   if (bitmap == null) {     getBitmap();   }   return bitmap; } /** * 通过底层来获取下一帧的图像 * * @return bitmap */ public Bitmap cutoutFrame() {   Image image = mImageReader.acquireLatestImage();   if (image == null) {     return null;   }   int width = image.getWidth();   int height = image.getHeight();   final Image.Plane[] planes = image.getPlanes();   final ByteBuffer buffer = planes[0].getBuffer();   int pixelStride = planes[0].getPixelStride();   int rowStride = planes[0].getRowStride();   int rowPadding = rowStride - pixelStride * width;   Bitmap bitmap = Bitmap.createBitmap(width +       rowPadding / pixelStride, height, Bitmap.Config.ARGB_8888);   bitmap.copyPixelsFromBuffer(buffer);   return Bitmap.createBitmap(bitmap, 0, 0, width, height); } public class RecordBinder extends Binder {   public ScreenService getRecordService() {     return ScreenService.this;   } }

demo下载

github

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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