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

http://blog.csdn.net/meijian531161724/article/details/46804281