仿QQ长按弹出功能菜单

android app普遍常用的弹出上下文菜单是列表式的。QQ列表，在上方弹出冒泡效果菜单，如图

这里讲解一下如何写出这个效果：

图片资源：两张图片，可以拼接成如上效果。

首先，我们需要写布局文件：
layout_pop.xml (mipmap是android studio 的引用图片的写法，以前常用@drawable/xxx)

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:padding="10dp">    <Button        android:id="@+id/bt_l"        style="@style/PopBtuton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@mipmap/bg_pop_l_t"        android:text="复制" />    <Button        android:id="@+id/bt_r"        style="@style/PopBtuton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_toRightOf="@+id/bt_l"        android:background="@mipmap/bg_pop_r_t"        android:text="回复" /></RelativeLayout>

布局效果

接下来是重点：
先贴代码
PopOptionUtil.java

package com.mjc.popdemo;import android.content.Context;import android.graphics.drawable.BitmapDrawable;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.PopupWindow;/** * Created by imac on 15/7/8. */public class PopOptionUtil {    private Context mContext;    private int popupWidth;    private int popupHeight;    private PopupWindow popupWindow;    private PopClickEvent mEvent;    private Button preBt;    private Button nextBt;    public PopOptionUtil(Context context) {        mContext = context;        View popupView = LayoutInflater.from(mContext).inflate(R.layout.layout_pop, null);        preBt = (Button) popupView.findViewById(R.id.bt_l);        nextBt = (Button) popupView.findViewById(R.id.bt_r);        popupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.WRAP_CONTENT,                ViewGroup.LayoutParams.WRAP_CONTENT, true);        popupWindow.setBackgroundDrawable(new BitmapDrawable());        popupView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);        popupWidth = popupView.getMeasuredWidth();        popupHeight = popupView.getMeasuredHeight();    }    public void show(View view) {        initEvent();        int[] location = new int[2];        view.getLocationOnScreen(location);        popupWindow.showAtLocation(view, Gravity.NO_GRAVITY, (location[0] + view.getWidth() / 2) - popupWidth / 2,                location[1] - popupHeight);    }    public void setOnPopClickEvent(PopClickEvent mEvent) {        this.mEvent = mEvent;    }    private void initEvent() {        if (mEvent != null) {            preBt.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    mEvent.onPreClick();                }            });            nextBt.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    mEvent.onNextClick();                }            });        }    }}

其中Event是自定义的接口，用来监听两个Button的事件的
下面就是
PopClickEvent.java

public interface PopClickEvent {    public void onPreClick();    public void onNextClick();}

使用方法：

package com.mjc.popdemo;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    View bt;    PopOptionUtil mPop;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bt = findViewById(R.id.test);        mPop = new PopOptionUtil(this);        mPop.setOnPopClickEvent(new PopClickEvent() {            @Override            public void onPreClick() {                Toast.makeText(MainActivity.this,"置顶",Toast.LENGTH_SHORT).show();            }            @Override            public void onNextClick() {                Toast.makeText(MainActivity.this,"删除",Toast.LENGTH_SHORT).show();            }        });        bt.setOnLongClickListener(new View.OnLongClickListener() {            @Override            public boolean onLongClick(View view) {                mPop.show(view);                bt.setSelected(true);                return true;            }        });    }}

最终效果：

是不是很简单的呢？快动手试试吧

参考：http://blog.csdn.net/u011494050/article/details/38691475