Android弹出提示框数据进行选择

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener{ 
TextView show;
final String[] items = new String[] { "300", "600", "1200", "3600", };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

show=(TextView) findViewById(R.id.textView1);

show.setOnClickListener(this);
}
@Override

public void onClick(View v) {
Log.i("dddd","ddgggg");

// TODO Auto-generated method stub
new AlertDialog.Builder(MainActivity.this)
.setTitle("频段选择").setItems(items,new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
show.setText(items[which]);
}
}).show();
//此处的反括号是setItems的括号
}

}