Android PopupWindow使用实例

示例效果如下：

 

MainActivity.xml

package sn.qdj.popupwindowdemo;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.PopupWindow;

public class MainActivity extends ActionBarActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    View root = getLayoutInflater().inflate(R.layout.popup, null);
    
    final PopupWindow popup = new PopupWindow(root, 400,200);
    Button btn = (Button)findViewById(R.id.btn);
    Button close = (Button)findViewById(R.id.close);
    btn.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
  // TODO Auto-generated method stub
  
  popup.showAtLocation(findViewById(R.id.btn), Gravity.BOTTOM, 0, 0);
  }
 });
    close.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
  // TODO Auto-generated method stub
  
  popup.dismiss();
  }
 });
  }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent" >
  <Button
    android:id="@+id/btn"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:text="弹出" />
  <Button
    android:id="@+id/close"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
 android:layout_toRightOf="@id/btn"
    android:text="关闭" />
</RelativeLayout>

popup.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical" >
  <Button
    android:id="@+id/btn1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="相册" />
  <Button
    android:id="@+id/btn2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="拍照" />
</LinearLayout>

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