001、仿微信右上角弹出菜单

一、效果图

 

二、代码

1、菜单布局

2、主布局

3、逻辑代码

package com.example.administrator.app_book_test;

import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private ActionBar actionBar;
    private TextView tv_plus;
    PopupWindow popupWindow;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //隐藏系统标题栏
        actionBar = getSupportActionBar();
        hideActionBar();//调用隐藏ActionBar的方法
        tv_plus = findViewById(R.id.tv_plus);//初始化视图
        tv_plus.setOnClickListener(this);//点击事件
    }
    //隐藏ActionBar的方法
    private void hideActionBar() {
        actionBar.hide();
    }
    //点击事件汇总
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.tv_plus:
                //点击事件
                showPopupWindow();
                break;
            case R.id.btn1:
                Toast.makeText(this, "按钮1被单击了", Toast.LENGTH_SHORT).show();
                popupWindow.dismiss();
                break;
        }
    }
    //显示popupWindow
    private void showPopupWindow(){
        //获取自定义菜单的布局文件
        final View popupWindow_view = getLayoutInflater().inflate(R.layout.wechat_menu_layout,null,false);
        //创建popupWindow，设置宽度和高度
        popupWindow = new PopupWindow(popupWindow_view,ActionBar.LayoutParams.WRAP_CONTENT,ActionBar.LayoutParams.WRAP_CONTENT,true);
        //内部控件的点击事件
        Button btn1 = popupWindow_view.findViewById(R.id.btn1);
        btn1.setOnClickListener(this);
        //设置菜单的显示位置
        popupWindow.showAsDropDown(tv_plus,0,0);
        //兼容5.0点击其他位置隐藏popupWindow
        popupWindow_view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                //必须写 v.performClick();解决与单击事件的冲突
                switch (motionEvent.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        //如果菜单不为空，且菜单正在显示
                        if(popupWindow!=null&&popupWindow.isShowing()){
                            popupWindow.dismiss();//隐藏菜单
                            popupWindow = null;//初始化菜单
                        }
                        break;
                    case MotionEvent.ACTION_UP:
                        view.performClick();
                        break;
                    default:
                        break;
                }
                return false;
            }
        });
    }
}