android 调用系统图片浏览器并返回图片路径

package com.zm;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class PicActivity extends Activity {
    /** Called when the activity is first created. */
	private Button myButton_02 = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        myButton_02 = (Button)findViewById(R.id.button_02);
        myButton_02.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
				startActivityForResult(intent, 1);
			}
		});
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
	{
		if (resultCode == Activity.RESULT_OK)
		{
			Uri uri = data.getData();
			Cursor cursor = this.getContentResolver().query(uri, null, null, null, null);
			cursor.moveToFirst();
			for (int i = 0; i < cursor.getColumnCount(); i++)
			{// 取得图片uri的列名和此列的详细信息
				System.out.println(i + "-" + cursor.getColumnName(i) + "-" + cursor.getString(i));
			}
		}
	}
    
    
    
}