九、PopupWindow

常用方法

1. setContentView(View contentView):设置 PopupWindow显示的View

2. showAsDropDown(View anchor):相对某个控件的位置(正左下方),无偏移

3. showAsDropDown(View anchor, int xoff, int yoff):相对某个控件的位置,有偏移

4. setFocusable(boolean focusable)设置是否获取焦点

5. setBackgroundDraywable(Drawable background) 设置背景

6. dismiss()关闭弹窗

7. setAnimationStyle(int animationStyle)设置加载动画

8. setTouchable(boolean touchable)设置触摸使能

9. setOutside Touchable(boolean touchable)设置PopupWindow外面的触摸使能

源码示例

1.ui主界面源码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <Button
        android:text="弹出PopupWindow"
        android:onClick="Btn_Clink"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

　　2. Popupwindow的ui界面

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@mipmap/ic_launcher"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <Button
        android:text="北京"
        android:id="@+id/btn_BeiJing"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="上海"
        android:id="@+id/btn_Shanghai"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

　　3.后台源代码

package com.example.mypopupwindow;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.PopupWindow;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


    }

    /**
     * 按钮点击事件
     * */
    public void Btn_Clink(View view) {

        //获取View
        View popupview=getLayoutInflater().inflate(R.layout.popup_view,null);

        //获取按钮
        Button btn1=popupview.findViewById(R.id.btn_BeiJing);
        Button btn2=popupview.findViewById(R.id.btn_Shanghai);

        //声明PopupWindow
        PopupWindow popupWindow=new PopupWindow(popupview,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                true);

        //设置背景色
        popupWindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.bg));

        //显示1
        popupWindow.showAsDropDown(view);
        //显示2
        //popupWindow.showAsDropDown(view,view.getWidth(),view.getHeight());

        //设置Popupwindow的内部的按钮点击事件
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.e("leo", "onClick: 点击了”北京“按钮");

                //关闭弹窗
                popupWindow.dismiss();
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.e("leo", "onClick: 点击了”上海“按钮" );

                //关闭弹窗
                popupWindow.dismiss();
            }
        });
    }
}