Android 修改系統來電鈴聲

 

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            String paths = mCurrentPath + MountPointManager.SEPARATOR                + mAdapter.getCheckedFileInfoItemsList().get(0).getFileName();            settingRingertone(paths);

 private void settingRingertone(String path) {       ContentValues cv = new ContentValues();       Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;              Cursor cursor = this.getContentResolver().query(uri,       null, MediaStore.MediaColumns.DATA + =?, new String[] { path }, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);       if (cursor.moveToFirst()) {       String _id = cursor.getString(0);       cv.put(AudioColumns.IS_RINGTONE, true);       cv.put(AudioColumns.IS_MUSIC, true);       // Insert the bell library       getContentResolver().update(uri, cv,MediaStore.MediaColumns.DATA + =?, new String[] { path });       Uri newUri = ContentUris.withAppendedId(uri, Long.valueOf(_id));       // Set up the bell       RingtoneManager.setActualDefaultRingtoneUri(this,RingtoneManager.TYPE_RINGTONE, newUri );       Toast.makeText(this, R.string.ring_set_succeed, Toast.LENGTH_SHORT).show();      }     }

如果不成功請檢查_id的值。