弹出窗口的布局

主布局

package com.example.popwindow;import android.os.Bundle;import android.app.Activity;import android.view.Gravity;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.PopupWindow;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;import android.widget.TextView;public class MainActivity extends Activity {    private TextView show;    private RadioGroup rg;    private Button btn;    private PopupWindow pop;    private View v1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        show = (TextView) findViewById(R.id.show);        btn = (Button) findViewById(R.id.btn);        btn.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                // TODO Auto-generated method stub                LayoutInflater in = LayoutInflater.from(MainActivity.this);                v1 = in.inflate(R.layout.pop, null);//得到布局                pop = new PopupWindow(v1,300,400 , true);//实例化弹出窗口                rg = (RadioGroup) v1.findViewById(R.id.rg);//设置单选按钮点击事件                rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {                                        @Override                    public void onCheckedChanged(RadioGroup group, int checkedId) {                        //声明单选按钮     并且实例化                        RadioButton rd = (RadioButton) v1.findViewById(group.getCheckedRadioButtonId());                        show.setText(rd.getText().toString());                        //关闭弹出窗口                        pop.dismiss();                    }                });                //显示弹出窗口          调用组件的按钮      位置              x,y                pop.showAtLocation(btn, Gravity.CENTER, 0, 0);                            }                    });    }}