android用Popup弹出窗(PopupWindow的使用方式)

//设置窗口样式pw = new PopupWindow(list, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

显示方式

pw.showAtLocation(popupLayout, Gravity.BOTTOM,0,0);

PopupActivity.java

package com.example.a20200712;import android.graphics.drawable.BitmapDrawable;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.GridView;import android.widget.LinearLayout;import android.widget.PopupWindow;import androidx.annotation.Nullable;import androidx.appcompat.app.AppCompatActivity;public class PopupActivity extends AppCompatActivity {    private LinearLayout popupLayout;    private PopupWindow pw;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.popup_layout);        View list = getLayoutInflater().inflate(R.layout.popup_list,null);        pw = new PopupWindow(list, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);        pw.setFocusable(true);//获得焦点        pw.setBackgroundDrawable(new BitmapDrawable());//点空白处 隐藏popup        popupLayout = findViewById(R.id.popup_layout_main);    }    public void onPopup(View view){        pw.showAtLocation(popupLayout, Gravity.BOTTOM,0,0);        //PopupWindow    }}

popup_layout.xml

<?xml version="1.0" encoding="utf-8"?>

popup_list.xml

<?xml version="1.0" encoding="utf-8"?>

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