Android学习之PopupWindow弹出窗口

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" 
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TextView 
    android:id="@+id/statusinfo"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent" 
    android:text="当前用户状态：在线" />
  <Button 
    android:id="@+id/popbut" 
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:text="状态" /> 
</LinearLayout>

 

 

 

popwindow.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
  <TextView
    android:id="@+id/popinfo"
    android:text="请选择您的当前状态：" 
    android:layout_width="wrap_content"
    android:textSize="20px"
    android:layout_height="wrap_content"/>
  <RadioGroup
    android:id="@+id/changestatus"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:checkedButton="@+id/online">
    <RadioButton
      android:id="@+id/online"
      android:text="在线"/>
    <RadioButton
      android:id="@+id/offline"
      android:text="离线"/>
    <RadioButton
      android:id="@+id/stealth"
      android:text="隐身"/>
  </RadioGroup>
  <Button 
    android:id="@+id/cancel" 
    android:layout_height="wrap_content"
    android:layout_width="wrap_content" 
    android:text="取消" />
</LinearLayout>

 

 

 

MyPopupWindowDemo.java:

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
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 MyPopupWindowDemo extends Activity {

  private Button popbut = null;               // 按钮组件
  private RadioGroup changestatus = null;         // 单选钮组件
  private TextView statusinfo = null;           // 文本显示组件
  private Button cancel = null;               // 按钮组件
  private PopupWindow popWin = null;            // 弹出窗口
  private View popView = null;              // 保存弹出窗口布局

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.main);        // 设置布局管理器
    this.popbut = (Button) super.findViewById(R.id.popbut); // 取得组件
    this.statusinfo = (TextView) super.findViewById(R.id.statusinfo); // 取得组件
    this.popbut.setOnClickListener(new OnClickListenerImpl()); // 设置单击事件
  }

  private class OnClickListenerImpl implements OnClickListener {  // 设置监听
    @Override
    public void onClick(View view) {
      LayoutInflater inflater = LayoutInflater
          .from(MyPopupWindowDemo.this);      // 取得LayoutInflater对象
      MyPopupWindowDemo.this.popView = inflater.inflate(
          R.layout.popwindow, null);        // 读取布局管理器
      MyPopupWindowDemo.this.popWin = new PopupWindow(popView, 300, 220,
          true);                  // 实例化PopupWindow
      MyPopupWindowDemo.this.changestatus = (RadioGroup) popView
          .findViewById(R.id.changestatus);     // 取得组件
      MyPopupWindowDemo.this.cancel = (Button) popView
          .findViewById(R.id.cancel);       // 取得组件
      MyPopupWindowDemo.this.changestatus
          .setOnCheckedChangeListener(
              new OnCheckedChangeListenerImpl()); // 设置监听
      MyPopupWindowDemo.this.cancel
          .setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
              MyPopupWindowDemo.this.popWin.dismiss(); // 关闭弹出窗口
            }
          });
      MyPopupWindowDemo.this.popWin.showAtLocation(
          MyPopupWindowDemo.this.popbut, 
          Gravity.CENTER, 0, 0);          // 显示弹出窗口
    }
  }

  private class OnCheckedChangeListenerImpl implements
      OnCheckedChangeListener {           // 选项选中时触发

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
      RadioButton but = (RadioButton) MyPopupWindowDemo.this.popView
          .findViewById(group.getCheckedRadioButtonId()); // 取得选中组件
      MyPopupWindowDemo.this.statusinfo.setText("当前用户状态："
          + but.getText().toString());      // 设置文本
      MyPopupWindowDemo.this.popWin.dismiss();    // 关闭弹出窗口
    }

  }
}