機器人如何調整視頻的寬度和高度表面觀爲媒體播放器

Question

要調整大小的視頻表面觀

我在玩的媒體播放器的視頻使用視頻從表面上看和持有人..

//但是在某些設備上實現MediaPlayerControl時，Micromax，iball，Akash平板電腦給出的抽象方法的錯誤不能通過ACRA錯誤跟蹤進行跟蹤。

現在我希望有上述問題的解決方案：

• 如何獲得活躍在wihtout崩潰所有設備的媒體播放器控件由於抽象方法，在某些 設備媒體控制器。

• 如何調整視頻的表面視圖大小。

的代碼上三星Galaxy GT P1000 OS 2.2和一些便宜的設備WorldTeck等工作F9

但在創意ziio 7 OS版本2.2.1（480×800）分辨率密度是160 dpi視頻似乎被放大並從邊緣切斷。

的代碼如下所示：

/* Media Player Control is commented due to force close in some devices say *micromax,Creative ziio, akash etc */ 

    public class VideoViewerActivity extends Activity implements 
      OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener, 
      OnVideoSizeChangedListener, SurfaceHolder.Callback { 
     // implements ERROR in some devices , MediaPlayerControl 
     private static final String TAG = "MediaPlayerDemo"; 
     private int mVideoWidth; 
     private int mVideoHeight; 
     private MediaPlayer mMediaPlayer; 
     private SurfaceView mPreview; 
     private SurfaceHolder holder; 
     private String path = ""; 
     private Bundle extras; 
     private static final String MEDIA = "media"; 
     private static final int LOCAL_AUDIO = 1; 
     private static final int STREAM_AUDIO = 2; 
     private static final int RESOURCES_AUDIO = 3; 
     private static final int LOCAL_VIDEO = 4; 
     private static final int STREAM_VIDEO = 5; 
     private boolean mIsVideoSizeKnown = false; 
     private boolean mIsVideoReadyToBePlayed = false; 
     /* ERROR In Abstract method implementation in the other devices */ 
     // private MediaController mediaController; 
     private Context context; 
     private final Handler handler = new Handler(); 

     /** 
     * 
     * Called when the activity is first created. 
     */ 
     @Override 
     public void onCreate(Bundle icicle) { 
      super.onCreate(icicle); 
      setContentView(R.layout.video_layout); 
      context = this; 
      path = getIntent().getExtras().getString("media"); 

      Log.v("arpit", "path " + path); 
      mPreview = (SurfaceView) findViewById(R.id.surfaceview1); 
      holder = mPreview.getHolder(); 
      holder.addCallback(this); 
      holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
      extras = getIntent().getExtras(); 

     } 

     private void playVideo() { 
      doCleanUp(); 
      try { 

       // Create a new media player and set the listeners 
       File f = new File(path); 
       // FileInputStream in = new FileInputStream(f); 

       RandomAccessFile randomAccessFile = new RandomAccessFile(f, "r"); 
       // randomAccessFile.skipBytes(1024); 
       FileDescriptor fileDescriptor = randomAccessFile.getFD(); 

       mMediaPlayer = new MediaPlayer(); 
       mMediaPlayer.setDataSource(fileDescriptor, Constant.key1.length 
         + Data.deviceID.length(), f.length()); 

       mMediaPlayer.setDisplay(holder); 
       mMediaPlayer.prepare(); 
       mMediaPlayer.setOnBufferingUpdateListener(this); 
       mMediaPlayer.setOnCompletionListener(this); 
       mMediaPlayer.setOnPreparedListener(this); 
       mMediaPlayer.setOnVideoSizeChangedListener(this); 
       mMediaPlayer.setScreenOnWhilePlaying(true); 

       // mediaController = new MediaController(this); 
       mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 

      } catch (Exception e) { 
       Log.e(TAG, "error: " + e.getMessage(), e); 
       Toast.makeText(context, "supported video was not found", 
         Toast.LENGTH_SHORT).show(); 
       finish(); 
      } 
     } 

     public void onVideoSizeChanged(MediaPlayer mp, int width, int height) { 
      Log.v(TAG, "onVideoSizeChanged called"); 
      if (width == 0 || height == 0) { 
       Log.e(TAG, "invalid video width(" + width + ") or height(" + height 
         + ")"); 
       return; 
      } 
      mIsVideoSizeKnown = true; 
      mVideoWidth = width; 
      mVideoHeight = height; 
      if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) { 
       startVideoPlayback(); 
      } 
     } 


     public void surfaceDestroyed(SurfaceHolder surfaceholder) { 
      Log.d(TAG, "surfaceDestroyed called"); 
     } 

     public void surfaceCreated(SurfaceHolder holder) { 
      Log.d(TAG, "surfaceCreated called"); 
      playVideo(); 

     } 

     private void doCleanUp() { 
      mVideoWidth = 0; 
      mVideoHeight = 0; 
      mIsVideoReadyToBePlayed = false; 
      mIsVideoSizeKnown = false; 
     } 

     private void startVideoPlayback() { 
      Log.v(TAG, "startVideoPlayback"); 
//also tried and used the below line but nothing good 


// holder.setFixedSize(480, 800); 

holder.setFixedSize(mVideoWidth, mVideoHeight); 

mMediaPlayer.start(); 

     } 


    } 

Answer 1

嗨arpit我也是在相同的設備上工作，你所提到的用於播放視頻文件， 我爲應用控制視頻播放器得到了同樣的問題（抽象方法不可用）。

按照有關這個主題的我 - [R & d我要得出這樣的結論定製的Android操作系統和這些設備的硬件不兼容對方，因爲它們質量很差相比，三星的設備， 這麼多雖然他們在Android操作系統但不支持這些設備的方法。

所以我認爲這些設備中沒有解決這些問題的方案。

plz嘗試在開發任何項目時使用標準設備進行關注。這可能會幫助你很多。

謝謝。 :)

Answer 2

我用來代替面視圖TextureView（它允許旋轉視頻），並設置其setScale {X | Y}（）適當：

@Override 
public void onVideoSizeChanged(MediaPlayer mp, int w, int h) { 
    if (w > 0 && h > 0) { 
     RelativeLayout.LayoutParams l; 
     DisplayMetrics metrics = new DisplayMetrics(); 
     getWindowManager().getDefaultDisplay().getMetrics(metrics); 
     l = new RelativeLayout.LayoutParams(metrics.heightPixels, metrics.widthPixels); 
     l.addRule(RelativeLayout.CENTER_IN_PARENT, -1); 
     float scale = (metrics.heightPixels * 1.0f)/(metrics.widthPixels * 1.0f); 
     videoView.setScaleX(scale); 
     videoView.setLayoutParams(l); 
     Log.d(YourApp.TAG, "video size: " + mp.getVideoWidth() + "x" + mp.getVideoHeight() + " vertical scale: " + scale); 
    } 
} 

注意，我旋轉我的視頻，這這就是爲什麼我設置X的比例。