android 防微信弹窗,android仿微信消息长按根据触摸位置弹出对话框

package com.example.administrator.myapplication;

import android.graphics.drawable.ColorDrawable;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.PopupWindow;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

PopupWindow mPopupWindow;

int screenHeight;

int screenWidth;

int downX;

int downY;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// 获取屏幕的高宽

screenHeight = getResources().getDisplayMetrics().heightPixels;

screenWidth = getResources().getDisplayMetrics().widthPixels;

ListView mListView = (ListView) findViewById(R.id.listview);

mListView.setAdapter(new CustomAdapter());

}

private void showPopupWindow(final View anchorView) {

View contentView = LayoutInflater.from(this).inflate(R.layout.popup_content_layout, null);

View.OnClickListener menuItemOnClickListener = new View.OnClickListener() {

@Override

public void onClick(View v) {

Toast.makeText(v.getContext(), "Click " + ((TextView) v).getText(), Toast.LENGTH_SHORT).show();

if (mP