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