PopupWindow

示例demo

main.xml布局代码：

<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:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="show"
        android:text="显示" />

</LinearLayout>

gridview的布局代码

<?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" 
    android:background="@drawable/bg">

    <GridView
        android:id="@+id/gv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:numColumns="4" 
        android:horizontalSpacing="2dip"
        android:verticalSpacing="2dip">
        
    </GridView>

</LinearLayout>

gridview渐变色背景

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
    android:shape="rectangle">
    
    <gradient 
        android:startColor="#5FF2FA"
        android:endColor="#4BED23"
        />
    

</shape>

item布局

<?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" >

    <ImageView
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@drawable/i1" />

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="5dip"
        android:text="搜索"
        android:textColor="#f00" />

</LinearLayout>

Acitivity代码：

package com.android.hzy.popupwindow;

import android.app.Activity;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.TextView;

public class MainActivity extends Activity {

    private PopupWindow mPopupWindow;
    private LayoutInflater mInflater;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mInflater = LayoutInflater.from(getApplicationContext());
    }

    public void show(View v) {
        View contentView = mInflater.inflate(R.layout.popupwindow, null);
        GridView gv = (GridView) contentView.findViewById(R.id.gv);
        gv.setAdapter(new MyAdapter());
        gv.setOnItemClickListener(new MyOnItemClickListener());
        
        mPopupWindow = new PopupWindow(contentView,
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        
        // 如果需要点击其他的地方 popupwindow自动消失：1.popupwindow必须指定背景   2.popupwindow必须获取焦点
        mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
        mPopupWindow.setFocusable(true);
        
        // 显示popupwindow窗口
//        mPopupWindow.showAsDropDown(v); // 显示在按钮下方
        mPopupWindow.showAtLocation((View)v.getParent(), Gravity.BOTTOM, 0, 0);// 显示在屏幕下方 
    }
    
    private final class MyOnItemClickListener implements OnItemClickListener{

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {
            // TODO Auto-generated method stub
            mPopupWindow.dismiss();
        }
        
    }

    public final class MyAdapter extends BaseAdapter {

        private int[] images = new int[] { R.drawable.i1, R.drawable.i2,
                R.drawable.i3, R.drawable.i4, R.drawable.i5, R.drawable.i6,
                R.drawable.i7, R.drawable.i8 };
        
        private String[] names = new String[] { "搜索", "文件管理", "下载管理", "全屏",
                "网址", "书签", "加入书签", "页面分享" };

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return images.length;
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return names[position];
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            View view = mInflater.inflate(R.layout.item, null);
            
            ImageView iv = (ImageView) view.findViewById(R.id.iv);
            TextView tv = (TextView) view.findViewById(R.id.tv);
            
            iv.setImageResource(images[position]);
            tv.setText(names[position]);
            return view;
        }

    }
}