PopupWindow的简单使用

测试代码：

package com.zzw.testpopuwindows;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.Button;

import android.widget.PopupWindow;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        final Button button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                LayoutInflater inflater = MainActivity.this.getLayoutInflater();

                View view = inflater.inflate(R.layout.item, null);

                PopupWindow mPopupWindow = new PopupWindow(view, 500, 300);

                //设置背景的目的是使setOutsideTouchable方法生效

                mPopupWindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.ic_launcher));

                mPopupWindow.setOutsideTouchable(true);//在外点击消失

                // mPopupWindow.showAsDropDown(button);

                mPopupWindow.showAtLocation(MainActivity.this.getWindow().getDecorView(), Gravity.CENTER, 0, 0);

            }

        });

    }

}

item.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:background="@android:color/darker_gray"

    android:orientation="vertical" >

    <ImageView

        android:layout_gravity="center"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:src="@drawable/ic_launcher" />

    <TextView

        android:layout_gravity="center"

        android:gravity="center"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="PopupWindow显示"

        android:textColor="@android:color/holo_red_light" />

</LinearLayout>