如何清除设置铃声前的媒体存储

Question

当我从我的应用程序设置铃声一次，但再次运行代码时，它会尝试在媒体存储中创建重复条目，这会产生问题。没有为每个声音文件创建独立的唯一文件名，我想解决这个问题。

我发现这个解决方案发布在一个答案在这里：setting audio file as Ringtone 我试图用它来修复我的。

当我在下面的代码中尝试它时，出现两个错误。一个是SQLiteException，另一个是RuntimeException，它是由Java代码之后的squlite错误引起的。

String TAG = "CFFS"; 


    File dir = new File(Environment.getExternalStorageDirectory()+ "/ringtones"); // Set base DIR where new ringtone will live 
    dir.mkdirs(); // create if directors don't exist 

    File outputFile = new File(dir, "College Fight Song.mp3"); // Define out new output file 


    Uri inURI = null; 
    try { 
     inURI = Uri.parse(getIntent().getStringExtra("com.carboni.fightsongs.FILE_RES_ID")); 
    } catch (Exception e) { 
     e.printStackTrace(); 
     Log.e(TAG, "Could not get URI " + e); 
    } 


    // If we didn't parse a good URI then don't execute the code below 
    if (inURI != null) { 
     InputStream in = null; 
     // Get the input stream 
     try { in = new BufferedInputStream(this.getContentResolver().openInputStream(inURI));   } 
     catch (Exception e) { Log.e(TAG, "Exception getting input stream " + e); } 

     // Get the output stream 
     OutputStream out = null; 
     try { out = new FileOutputStream(outputFile); } 
     catch (Exception e) { Log.e(TAG, "Exception getting output stream " + e); } 

     // Again, if we don't have 2 good handles then don't try to read/write them 
     if ((in != null) && (out != null)) { 

      byte[] buf = new byte[1024]; // Define our buffer size 
      int bytesRead = 0; 
      while (bytesRead >= 0) { 
       try { 
        bytesRead = in.read(buf, 0, buf.length); // Read max of 1024 bytes 
        if (bytesRead > 0) 
         out.write(buf); // Write buffer to new file if we got a good read 
       } catch (Exception e) { 
        Log.e(TAG,"Exception reading " + e); 
        e.printStackTrace(); 
       }     
      } 
     } 
     // Close out handles and proceed 
     try { 
      in.close(); 
      out.close(); 
     } 
     catch (Exception e) { Log.e(TAG, "Exception closing streams " + e); } 

     ContentValues v = new ContentValues(); 
     v.put(MediaStore.MediaColumns.DATA, outputFile.getAbsolutePath()); 
     v.put(MediaStore.MediaColumns.TITLE, "College Football Fight Song"); 
     v.put(MediaStore.MediaColumns.SIZE, outputFile.length()); 
     v.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3"); 
     v.put(MediaStore.Audio.Media.IS_RINGTONE, true); 

     Uri pURI = MediaStore.Audio.Media.getContentUriForPath(outputFile.getAbsolutePath()); 

     // remove entry every time so we don't get duplicate entries and have a problem setting a 2nd time 
     getContentResolver().delete(pURI, MediaStore.MediaColumns.DATA + "\"" + outputFile.getAbsolutePath() + "\"", null); 

     Uri nURI = this.getContentResolver().insert(pURI, v); 

     Log.i(TAG, "Setting ringtone URI to " + nURI); 

     // Set ringtone 
     RingtoneManager.setActualDefaultRingtoneUri(this, RingtoneManager.TYPE_RINGTONE, nURI); 
     Toast.makeText(this, "Ringtone set", Toast.LENGTH_LONG).show(); 

错误：

09-03 14:16:08.343: ERROR/DatabaseUtils(11968): android.database.sqlite.SQLiteException: near ""/mnt/sdcard/ringtones/College Fight Song.mp3"": syntax error: , while compiling: DELETE FROM audio_meta WHERE _data"/mnt/sdcard/ringtones/College Fight Song.mp3" 

Answer 1

它看起来像错误是这一行：

getContentResolver().delete(pURI, MediaStore.MediaColumns.DATA + "\"" + outputFile.getAbsolutePath() + "=\"", null);