android WindowManager的简单使用

引用

https://blog.csdn.net/Love667767/article/details/105735008

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />
    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.App0"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>
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package com.koala.app0;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    private static Context context;
    private Button button;
    private View imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = getApplication().getApplicationContext();
        button = findViewById(R.id.btn1);

        imageView = LayoutInflater.from(context).inflate(R.layout.png,null);

        button.setOnClickListener(listener);

    }

    private View.OnClickListener listener =  new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
//            layoutParams.format = PixelFormat.RGBA_8888;
            layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
//            layoutParams.width = 200;
//            layoutParams.height = 200;

//            layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;

//            layoutParams.gravity = Gravity.BOTTOM | Gravity.LEFT;
            layoutParams.x = 30;
            layoutParams.y = 40;
            WindowManager windowManager = getWindowManager();
            windowManager.addView(imageView,layoutParams);
        }
    };
    
    
    

    public static Context getContext(){
        return context;
    }
}

其他选项
WindowManager mWindowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
WindowManager.LayoutParams = new WindowManager.LayoutParams();
View mView = LayoutInflater.from(mContext).inflate(R.layout.pop_message_view, null);
//设置图片格式，效果为背景透明
mLayoutParams.format = PixelFormat.RGBA_8888;
//悬浮窗位置
mLayoutParams.x = 768; 
mLayoutParams.y = 100;
//悬浮窗大小
mLayoutParams.width = 1026;
mLayoutParams.height = 400;
//悬浮窗起始位置
mLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;
//悬浮窗口类型
mLayoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
mLayoutParams.flags = WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
//悬浮窗动画
mLayoutParams.windowAnimations = R.style.toast_anim_view;
mWindowManager.addView(mView, mLayoutParams);

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