視頻採集使用回調顯示方向更改錯誤

Question

我已經創建了一個應用程序，它可以這樣工作，它要求用戶選擇一個視頻，他可以通過從圖庫中選擇或僅在當時捕獲視頻來選擇視頻。

爲了這個，我已經寫了我這樣的代碼： -

public class VideoQuestionActivity extends Activity implements View.OnClickListener, Callback 
{ 
/Here I have declared my object like Button etc so omitting this from code/

private Dialog myDialog; 
private Dialog videoDialog; 


private File videoFolder; 
private String videoFileName; 
private String selectedVideoPath; 
private Uri selectedVideoURI; 
private Bitmap bMap; 

private SurfaceView surfaceView; 
private SurfaceHolder surfaceHolder; 
private MediaPlayer mediaPlayer; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.question); 


    mCurrentSurvey =(Survey)getIntent().getSerializableExtra("CurrentSurvey"); 
    mCurrentQuestion =(Question)getIntent().getSerializableExtra("CurrentQuestion"); 

    Initialize(); 
} 

public void Initialize() 
    { 
    // This function initializes the objects like buttons, surface view media player so also omitting this just to keep the code simple 
    } 

@Override 
public void onClick(View v) 
{ 
    // TODO Auto-generated method stub 

    switch(v.getId()) 
    { 

     case R.id.btnQuestionTypeAction: 
      getVideo(); 
      break; 

     case R.id.btn_live: 
      Intent liveIntent= new Intent( android.provider.MediaStore.ACTION_VIDEO_CAPTURE); 
        startActivityForResult(liveIntent,RESULT_CAPTURE_VIDEO); 
      myDialog.dismiss(); 
      break; 

     case R.id.btn_gallery: 
      Intent galIntent = new Intent(Intent.ACTION_GET_CONTENT); 
      galIntent.setType("video/*"); 
      startActivityForResult(galIntent,RESULT_LOAD_VIDEO); 
      myDialog.dismiss(); 
      break; 
     case R.id.btnCancel: 
      videoDialog.dismiss(); 
      break; 

     case R.id.btnOk: 
      videoDialog.dismiss(); 
      boolean sdcardAvailable = sdcardState(); 
      if(sdcardAvailable) 
      { 

      videoFolder =new File(userFolderPath+"/Videos"); 
      if(!videoFolder.exists()) 
      { 
       videoFolder.mkdir(); 
      } 

      CopyFile(selectedVideoPath,videoFolder.toString()); 

      try { 
       mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
       mediaPlayer.setDisplay(surfaceHolder); 
       mediaPlayer.setDataSource(getApplicationContext(), selectedVideoURI); 
       mediaPlayer.prepare(); 
       mediaPlayer.start(); 

      } 
      catch (IllegalArgumentException e) 
      { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      catch (SecurityException e) 
      { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      catch (IllegalStateException e) 
      { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      catch (IOException e) 
      { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      Toast.makeText(getApplicationContext(),selectedVideoPath , Toast.LENGTH_LONG).show(); 
      } 
      else 
      { 
       Toast.makeText(getApplicationContext(),"SD Card not available", Toast.LENGTH_LONG).show(); 
      } 
      break; 
    } 
} 

public void startIntentForController() 
{ 
    // this function calls another activity so omitting this from code. 
} 

@Override 
public void onBackPressed() { 



} 

private void getVideo() 
{ 
    boolean sdcardAvailable = sdcardState(); 
    if(sdcardAvailable) 
    { 
     extStorageDirectory= Environment.getExternalStorageDirectory().getAbsolutePath().toString(); 
     userFolderPath=extStorageDirectory+"/User"; 
     File userFolder=new File(userFolderPath); 
     if(!(userFolder.exists())) 
      userFolder.mkdir(); 
     dialogShow(); 
    } 
    else 
    { 
     AlertDialog.Builder builder = new AlertDialog.Builder(this); 
     builder.setMessage("SD Card unavailable.....") 
       .setCancelable(false) 
       .setPositiveButton("OK", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int id) { 
        } 
       }); 
     AlertDialog alert = builder.create(); 
     alert.show(); 
    } 
} 

public boolean sdcardState() 
{ 
    sdcardState = Environment.getExternalStorageState(); 

    if (Environment.MEDIA_MOUNTED.equals(sdcardState)) 
    { 
     // We can read and write the media 
     return true; 
    } 
    else  
    { 
     // We can't read and write the media 
     return false; 
    } 
} 
public void dialogShow() 
{ 
    myDialog = new Dialog(VideoQuestionActivity.this); 
    myDialog.setContentView(R.layout.picturecustomdialog); 

    //Initializing the UI component of custom dialog 
    TextView title = (TextView) myDialog.findViewById(R.id.lbl_photo); 
    TextView subTitle = (TextView) myDialog.findViewById(R.id.lbl_source); 
    Button gallery=(Button) myDialog.findViewById(R.id.btn_gallery); 
    Button live=(Button) myDialog.findViewById(R.id.btn_live); 

    //Setting the value to each UI component of custom dialog 
    title.setText("Attach a Video"); 
    subTitle.setText("Choose a source"); 
    gallery.setText("Gallery"); 
    live.setText("Capture"); 

    myDialog.show(); 
    gallery.setOnClickListener(this); 
    live.setOnClickListener(this); 
} 



@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{ 
    super.onActivityResult(requestCode, resultCode, data); 

    if (requestCode == RESULT_LOAD_VIDEO && resultCode == RESULT_OK && data != null) 
    { 

     myDialog.dismiss(); 
     Uri myVideo; 
     myVideo= data.getData();  
     selectedVideoURI=myVideo; 
     selectedVideoPath= getRealPathFromURI(myVideo); 
     videoDialogshow(); 

    } 

    if (requestCode == RESULT_LOAD_VIDEO && resultCode == RESULT_CANCELED && data!= null) 
    { 
     finish(); 
    } 

    if (requestCode == RESULT_CAPTURE_VIDEO && resultCode == RESULT_OK) 
    { 


     myDialog.dismiss(); 
     Uri myVideo; 
     myVideo= data.getData(); 
     selectedVideoURI=myVideo; 
     selectedVideoPath= (getRealPathFromURI(myVideo)); 
     videoDialogshow(); 
    } 

    if (requestCode == RESULT_CAPTURE_VIDEO && resultCode == RESULT_CANCELED) 
    { 
     finish(); 
    } 
    if(resultCode==RESULT_CANCELED) 
    { 
     mCurrentSurvey.setSurveyQuestionIndex(mCurrentSurvey.getSurveyQuestionIndex()); 
     startIntentForController(); 
    } 
} 


public String getRealPathFromURI(Uri contentUri) 
{ 
    String imgAbsolutePath; 
    String[] proj = { MediaStore.Video.Media.DATA }; 
    Cursor cursor = managedQuery(contentUri, proj, null, null, null); 
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA); 
    cursor.moveToFirst(); 
    imgAbsolutePath=cursor.getString(column_index); 
    return imgAbsolutePath; 
} 

public void videoDialogshow() 
{ 
    videoDialog = new Dialog(VideoQuestionActivity.this); 
    videoDialog.setContentView(R.layout.mediacontaincustomdialog); 

    //Initializing the UI component of custom dialog 
    Button btnVideoCancel = (Button) videoDialog.findViewById(R.id.btnCancel); 
    Button btnVideoOk = (Button) videoDialog.findViewById(R.id.btnOk); 
    btnVideoCancel.setBackgroundResource(R.drawable.img_wrong); 
    btnVideoOk.setBackgroundResource(R.drawable.img_right); 

    //Setting the value to each UI component of custom dialog 
    LinearLayout llMediaView =(LinearLayout) videoDialog.findViewById(R.id.llMediaView); 
    final VideoView mediaVideoView=new VideoView(this); 

    mediaVideoView.setVideoURI(selectedVideoURI); 
    mediaVideoView.setMediaController(new MediaController(this)); 
    mediaVideoView.requestFocus(); 
    llMediaView.addView(mediaVideoView); 
    videoDialog.show(); 

    bMap = ThumbnailUtils.createVideoThumbnail(selectedVideoPath, MediaStore.Video.Thumbnails.MICRO_KIND); 
    mediaVideoView.setBackgroundDrawable(new BitmapDrawable(getResources(), bMap)); 
    mediaVideoView.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      // TODO Auto-generated method stub 
      mediaVideoView.start(); 
     } 
    }); 

    btnVideoCancel.setOnClickListener(this); 
    btnVideoOk.setOnClickListener(this); 
} 



public boolean CopyFile(String srcPath,String destPath) 
{ 
    //this function copies the file to a custom location in my sd card so also omitting this 
} 

@Override 
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { 
    // TODO Auto-generated method stub 
} 

@Override 
public void surfaceCreated(SurfaceHolder holder) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void surfaceDestroyed(SurfaceHolder holder) { 
    // TODO Auto-generated method stub 
    mediaPlayer.reset(); 
} 

@Override 
protected void onDestroy() 
{ 
    // TODO Auto-generated method stub 
    super.onDestroy(); 
    mediaPlayer.release(); 
} 
} 

下面這段代碼工作正常，我的手機上，但每當我改變方向，然後我的應用程序崩潰。

而且在我的表現我已經添加了配置的變化屬性即： -

android:configChanges="keyboardHidden|orientation" 

，I M把我的logcat，

07-05 20:26:09.203: E/AndroidRuntime(1907): FATAL EXCEPTION: main 
07-05 20:26:09.203: E/AndroidRuntime(1907): java.lang.IllegalStateException 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.media.MediaPlayer._reset(Native Method) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.media.MediaPlayer.reset(MediaPlayer.java:1066) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at com.optimus.mobile.question.VideoQuestionActivity.surfaceDestroyed(VideoQuestionActivity.java:475) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.SurfaceView.reportSurfaceDestroyed(SurfaceView.java:568) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.SurfaceView.updateWindow(SurfaceView.java:472) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:206) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.View.dispatchDetachedFromWindow(View.java:6173) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewRoot.dispatchDetachedFromWindow(ViewRoot.java:1630) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewRoot.doDie(ViewRoot.java:2671) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.ViewRoot.die(ViewRoot.java:2641) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:218) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.view.Window$LocalWindowManager.removeViewImmediate(Window.java:436) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3684) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3789) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.app.ActivityThread.access$2400(ActivityThread.java:125) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2037) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.os.Looper.loop(Looper.java:123) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at java.lang.reflect.Method.invoke(Method.java:521) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
07-05 20:26:09.203: E/AndroidRuntime(1907):  at dalvik.system.NativeStart.main(Native Method) 

我如何能解決這個問題有什麼想法？

Answer 1

您需要添加一個onConfigurationChanged（）方法。這樣它會自動保存到應用程序的當前進度，並在方向之間切換時保持運行狀態。

此鏈接可能會幫助你多一點你的問題。當我遇到同樣的問題時，它對我有用。

http://developer.android.com/guide/topics/manifest/activity-element.html