無法使用SurfaceView相機保存視頻錄製文件android

Question

我可以錄製視頻文件，但無法將錄製的視頻文件保存在手機內存中。所以請任何人幫助我將錄製的視頻文件保存在手機內存中。我是Android新手請幫助我。

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback { 
    private final String VIDEO_PATH_NAME = "/sdcard/default.mp4"; 
    public static final int MEDIA_TYPE_VIDEO = 2; 
    private MediaRecorder mMediaRecorder; 
    private Camera mCamera; 
    private SurfaceView mSurfaceView; 
    private SurfaceHolder mHolder; 
    private View mToggleButton; 
    private boolean mInitSuccesful; 
    private File fileUri; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView); 
     mHolder = mSurfaceView.getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
     fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO); 

     mToggleButton = (ToggleButton) findViewById(R.id.toggleRecordingButton); 
     mToggleButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      // toggle video recording 
      public void onClick(View v) { 
       if (((ToggleButton) v).isChecked()) { 
        mMediaRecorder.start(); 
        try { 
         Thread.sleep(10 * 1000); 
        } catch (Exception e) { 
         e.printStackTrace(); 
        } 
        finish(); 
       } else { 
        mMediaRecorder.stop(); 
        mMediaRecorder.reset(); 
        try { 
         initRecorder(mHolder.getSurface()); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 
     }); 
    } 

    private void initRecorder(Surface surface) throws IOException { 
     if (mCamera == null) { 
      mCamera = Camera.open(); 
      mCamera.unlock(); 
     } 
     if (mMediaRecorder == null) mMediaRecorder = new MediaRecorder(); 
     mMediaRecorder.setPreviewDisplay(surface); 
     mMediaRecorder.setCamera(mCamera); 
     mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); 
     mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 
     mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); 
     mMediaRecorder.setOutputFile("/sdcard/videocapture_example.mp4"); 
     try { 
      mMediaRecorder.prepare(); 
     } catch (IllegalStateException e) { 
      e.printStackTrace(); 
     } 
     mInitSuccesful = true; 
    } 

    @Override 
    public void surfaceCreated(SurfaceHolder holder) { 
     try { 
      if (!mInitSuccesful) 
       initRecorder(mHolder.getSurface()); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    public void surfaceDestroyed(SurfaceHolder holder) { 
     shutdown(); 
    } 

    @Override 
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { 
    } 

    private void shutdown() { 
     mMediaRecorder.reset(); 
     mMediaRecorder.release(); 
     mCamera.release(); 
     mMediaRecorder = null; 
     mCamera = null; 
    } 

    private File getOutputMediaFileUri(int type) { 
     File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
       Environment.DIRECTORY_PICTURES), "MyCameraApp"); 
     Log.d("Media Store Directory", "" + mediaStorageDir); 
     // Create the storage directory if it does not exist 
     if (!mediaStorageDir.exists()) { 
      if (!mediaStorageDir.mkdirs()) { 
       Log.d("MyCameraApp", "failed to create directory"); 
       return null; 
      } 
     } 
     // Create a media file name 
     String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
     File mediaFile; 
     if (type == MEDIA_TYPE_VIDEO) { 
      mediaFile = new File(mediaStorageDir.getPath() + File.separator + 
        "VID_" + timeStamp + ".mp4"); 
      Log.d("Video file", "" + mediaFile); 
     } else { 
      return null; 
     } 
     return mediaFile; 
    } 
} 

main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical"> 

    <ToggleButton 
     android:id="@+id/toggleRecordingButton" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:textOff="Start Recording" 
     android:textOn="Stop Recording" /> 

    <FrameLayout 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"> 

     <SurfaceView 
      android:id="@+id/surfaceView" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"></SurfaceView> 

    </FrameLayout> 
</LinearLayout> 

許可

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

Answer 1

我認爲你已經使用到保存文件的路徑不正確

mMediaRecorder.setOutputFile("/sdcard/videocapture_example.mp4"); 

嘗試：

mMediaRecorder.setOutputFile(new File(Environment.getExternalStorageDirectory(),"videocapture_example.mp4"); 

此方法Environment.getExternalStorageDirectory()不一定會返回到SD卡的路徑。 Here你可以找到更多關於這方面的細節。