Android 使用PopupWindow

Android 使用PopupWindow

mainactivity.Java

import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Button btn_show;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = MainActivity.this;
        btn_show = (Button) findViewById(R.id.btn_show);
        btn_show.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                initPopWindow(v);
            }
        });
    }






    private void initPopWindow(View v) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.item_popip, null, false);
        Button btn_update = (Button) view.findViewById(R.id.btn_update);
        Button btn_delete = (Button) view.findViewById(R.id.btn_delete);
        Button btn_info = (Button) view.findViewById(R.id.btn_info);
        //1.构造一个PopupWindow，参数依次是加载的View，宽高
        final PopupWindow popWindow = new PopupWindow(
                view,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                true);

        popWindow.setAnimationStyle(R.anim.anim_pop);  //设置加载动画

        // 这些为了点击非PopupWindow区域，PopupWindow会消失的，如果没有下面的
        // 代码的话，你会发现，当你把PopupWindow显示出来了，无论你按多少次后退键
        // PopupWindow并不会关闭，而且退不出程序，加上下述代码可以解决这个问题
        popWindow.setTouchable(true);
        popWindow.setTouchInterceptor(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                return false;
                // 这里如果返回true的话，touch事件将被拦截
                // 拦截后 PopupWindow的onTouchEvent不被调用，这样点击外部区域无法dismiss
            }
        });

        popWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));    //要为popWindow设置一个背景才有效

        //设置popupWindow显示的位置，参数依次是参照View，x轴的偏移量，y轴的偏移量
        popWindow.showAsDropDown(v, 50, 0);

        //设置popupWindow里的按钮的事件
        btn_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "你点击了删除按钮", Toast.LENGTH_SHORT).show();
                popWindow.dismiss();
            }
        });

        btn_update.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "你点击了更新按钮", Toast.LENGTH_SHORT).show();
                popWindow.dismiss();
            }
        });

        btn_info.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "你点击了查看按钮", Toast.LENGTH_SHORT).show();
                popWindow.dismiss();
                Intent intent = new Intent(MainActivity.this, SecondActivity.class);
                startActivity(intent);
            }
        });

        btn_info.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                Toast.makeText(MainActivity.this, "按钮被长按", Toast.LENGTH_SHORT).show();
                return true;
            }
        });
    }
}

SecondActivity.java

import android.os.Bundle;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class SecondActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:layout_centerInParent="true"
        android:id="@+id/btn_show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示PopupWindow" />

RelativeLayout>

activity_second.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="dhoashdaisoidashiodhoiashodihasohdouas" />

androidx.constraintlayout.widget.ConstraintLayout>

anim_pop.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha
        android:duration="50000"
        android:fromAlpha="0"
        android:toAlpha="1">alpha>
set>

item_popip.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/ic_pop_bg"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:text="查看"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_update"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:text="修改"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_delete"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:text="删除"
        android:textSize="18sp" />




LinearLayout>

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <activity
            android:name=".SecondActivity"
            android:exported="true" />
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            intent-filter>
        activity>
    application>

manifest>