Android 铃声设置界面，起始位置为当前已选项

直接看代码：
import android.app.*;import android.content.Intent;import android.media.RingtoneManager;import android.net.Uri;import android.os.*;import android.util.*;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity{private Uri myUri = null;@Override public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Button myButton = (Button) findViewById(R.id.myButton);myButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent intent = new Intent();intent.setAction(RingtoneManager.ACTION_RINGTONE_PICKER);        // Allow user to pick 'Default'        //intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE,"设置通知铃声");        // Show only ringtones        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);        // Don't show 'Silent'        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, false);        //Uri ringtoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);        // Put checkmark next to the current ringtone for this contact        if(myUri != null)        {        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, myUri);        //intent.putExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI, myUri);        }        // Launch!        startActivityForResult(intent, 0);}});    }@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data){try{myUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);Log.i("pickedUri", myUri.toString() + "");}catch (Exception e){e.printStackTrace();}}}
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