Android的书面文件问题设置歌曲作为铃声

Question

我已经成功地写了一个程序来设置歌曲作为铃声，但面临的一个非常小的问题

当我做水龙头上的按钮进行第一次设置歌曲作为铃声，让这：

但是当我做再次点击按钮（第二次），得到这个：

那么可能是什么原因？为什么我从来没有在第一次成功...

这里是的完整代码RingtoneActivity.java：

public class RingtoneActivity extends Activity { 

    private final Context context = this; 
    private static final String TAG = "Meri Desi Look"; 
    private File sound; 
    private final File folder = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RINGTONES); 
    private MediaPlayer mediaPlayer; 

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

     Button buttonRingtone = (Button) findViewById(R.id.btnRingtone); 
     buttonRingtone.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       ask(); 
      } 
     }); 
    } 


    private void ask() { 
     mediaPlayer = MediaPlayer.create(this, R.raw.meri_desi_look); 
     mediaPlayer.start(); 
     AlertDialog.Builder alert = new AlertDialog.Builder(context); 
     alert.setTitle("Meri Desi Look"); 
     alert.setMessage("You want this sound as your ringtone?"); 
     alert.setCancelable(false); 
     alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int whichButton) { 
       mediaPlayer.stop(); 
       mediaPlayer.reset(); 
       confirmed(); 
       dialog.dismiss(); 
      } 
     }); 
     alert.setNegativeButton("No", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int whichButton) { 
       mediaPlayer.stop(); 
       mediaPlayer.reset(); 
       dialog.dismiss(); 
      } 
     }); 
     alert.show(); 
    } 

    /** 
    * When the user confirms the popup, this will run, saving the file and 
    * setting the ringtone utilising the RingtoneManager class. 
    */ 
    private void confirmed() { 
     Boolean success = false; 
     sound = new File(folder, "meri_desi_look.mp3"); 
     if (!sound.exists()) { 
      Log.i(TAG, "Writing Meri Desi Look to " + folder.toString()); 
      try { 
       InputStream in = getResources().openRawResource(R.raw.meri_desi_look); 
       FileOutputStream out = new FileOutputStream(sound.getPath()); 
       byte[] buff = new byte[1024]; 
       int read = 0; 

       try { 
        while ((read = in.read(buff)) > 0) { 
         out.write(buff, 0, read); 
        } 
       } finally { 
        in.close(); 

        out.close(); 
       } 
      } catch (Exception e) { 
       success = false; 
       Log.i(TAG, "Desi Look failed to write."); 
      } 
     } else { 
      success = true; 
      Log.i(TAG, "Meri Desi Look ringtone already there."); 
     } 

     if (!success) { 
      onSetRingtoneError("We couldn't give you a Meri Desi Look ringtone.\n\nThere's an issue writing the file."); 
     } else { 
      setRingtone(); 
     } 
    } 

    /** 
    * Physically sets the RingtoneManager preferences. 
    */ 
    private void setRingtone() { 
     try { 
      ContentValues values = new ContentValues(); 
      values.put(MediaStore.MediaColumns.DATA, sound.getAbsolutePath()); 
      values.put(MediaStore.MediaColumns.TITLE, "Meri Desi Look - performed by Sunny Leone"); 
      values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/*"); 
      values.put(MediaStore.Audio.Media.ARTIST, "Meri Desi Look"); 
      values.put(MediaStore.Audio.Media.IS_RINGTONE, true); 
      values.put(MediaStore.Audio.Media.IS_NOTIFICATION, true); 
      values.put(MediaStore.Audio.Media.IS_ALARM, true); 
      values.put(MediaStore.Audio.Media.IS_MUSIC, true); 

      Uri uri = MediaStore.Audio.Media.getContentUriForPath(sound.getAbsolutePath()); 
      getContentResolver().delete(uri, MediaStore.MediaColumns.DATA + "=\"" + sound.getAbsolutePath() + "\"", 
        null); 
      Uri newUri = getContentResolver().insert(uri, values); 

      RingtoneManager.setActualDefaultRingtoneUri(context, RingtoneManager.TYPE_RINGTONE, newUri); 
      onSetRingtoneSuccess(); 
     } catch (Exception e) { 
      onSetRingtoneError("We couldn't give you a Meri Desi Look ringtone.\n\nThere's an issue setting the file."); 
     } 
    } 

    /** 
    * Generic helper to show error messages (if ever there are any) :p 
    * 
    * @param message 
    */ 
    private void onSetRingtoneError(String message) { 
     AlertDialog.Builder alert = new AlertDialog.Builder(context); 
     alert.setTitle("Meri Desi Look"); 
     alert.setMessage(message); 
     alert.setCancelable(false); 
     alert.setPositiveButton("OK. That's too bad.", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int whichButton) { 
       dialog.dismiss(); 
      } 
     }); 
     alert.show(); 
    } 


    private void onSetRingtoneSuccess() { 
     AlertDialog.Builder alert = new AlertDialog.Builder(context); 
     alert.setTitle("Meri Desi Look"); 
     alert.setMessage("You've got the ringtone :)\n\nHope you enjoy it!"); 
     alert.setCancelable(false); 
     alert.setPositiveButton("Sweet!", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int whichButton) { 
       dialog.dismiss(); 
      } 
     }); 
     alert.show(); 
    } 

    @Override 
    protected void onPause() { 
     if (mediaPlayer.isPlaying()) { 
      mediaPlayer.stop(); 
      mediaPlayer.release(); 
     } 
     super.onPause(); 
    } 

} 

Answer 1

我想你一定早就想通了其中的问题是代码。但是，如果你没有，尝试以下。

private void confirmed() { 
... 

try { 
     while ((read = in.read(buff)) > 0) { 
     out.write(buff, 0, read); 
    } 
    success = true; 
} 
catch(Exception e) { 
    success = false; 
    e.printStackTrace(); 
} 
finally { 
    n.close(); 
    out.close(); 
} 
... 

}