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));
}
}
}

}