android 8.0 悬浮窗 最简demo

MainActivity.java文件

package com.example.performance;

import android.app.Activity;

import android.content.Intent;

import android.os.Build;

import android.os.Bundle;

import android.provider.Settings;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        if (Build.VERSION.SDK_INT >= 23) {

            if (Settings.canDrawOverlays(MainActivity.this)) {

//                Intent intent = new Intent(MainActivity.this, FloatingService.class);

                Toast.makeText(MainActivity.this,"已开启Toucher",Toast.LENGTH_SHORT).show();

//                startService(intent);

//                finish();

            } else {

                //若没有权限，提示获取.

                Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);

                Toast.makeText(MainActivity.this,"需要取得权限以使用悬浮窗",Toast.LENGTH_SHORT).show();

                startActivity(intent);

            }

        } else {

            //SDK在23以下，不用管.

//            Intent intent = new Intent(MainActivity.this, FloatingService.class);

//            startService(intent);

//            finish();

        }

      setContentView(R.layout.activity_main);

      Button startFloatWindow=(Button) findViewById(R.id.btn_floatWindows);

      startFloatWindow.setOnClickListener(new OnClickListener() {

          @Override

          public void onClick(View v) {

              Intent intent=new Intent(MainActivity.this, FloatingService.class);

              startService(intent);

              finish();

          }

      });

      super.onCreate(savedInstanceState);

    }

}

　　

FloatingService.java 文件

package com.example.performance;

import android.annotation.SuppressLint;

import android.app.Service;

import android.content.Intent;

import android.graphics.Color;

import android.graphics.PixelFormat;

import android.os.Build;

import android.os.IBinder;

import android.provider.Settings;

import android.view.MotionEvent;

import android.view.View;

import android.view.WindowManager;

import android.widget.Button;

@SuppressLint({ "ShowToast", "ClickableViewAccessibility" })

public class FloatingService extends Service {

    @Override

    public IBinder onBind(Intent intent) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

        showFloatingWindow();

        return super.onStartCommand(intent, flags, startId);

    }

    private void showFloatingWindow() {

        if (Settings.canDrawOverlays(this)) {

            // 获取WindowManager服务

            final WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

            // 新建悬浮窗控件

            final Button button = new Button(getApplicationContext());

            button.setText("Floating Window");

            button.setBackgroundColor(Color.BLUE);

            // 设置LayoutParam

            final WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

                layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;

            } else {

                layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;

            }

            layoutParams.format = PixelFormat.RGBA_8888;

            layoutParams.width = 500;

            layoutParams.height = 100;

            layoutParams.x = 100;

            layoutParams.y = 300;

            layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;

            // 将悬浮窗控件添加到WindowManager

            windowManager.addView(button, layoutParams);

            button.setOnTouchListener(new View.OnTouchListener(){

                private int x;

                private int y;

                @Override

                public boolean onTouch(View view, MotionEvent event) {

                switch (event.getAction()) {

                case MotionEvent.ACTION_DOWN:

                    x = (int) event.getRawX();

                    y = (int) event.getRawY();

                    break;

                case MotionEvent.ACTION_MOVE:

                    int nowX = (int) event.getRawX();

                    int nowY = (int) event.getRawY();

                    int movedX = nowX - x;

                    int movedY = nowY - y;

                    x = nowX;

                    y = nowY;

                    layoutParams.x = layoutParams.x + movedX;

                    layoutParams.y = layoutParams.y + movedY;

                    // 更新悬浮窗控件布局

                    windowManager.updateViewLayout(view, layoutParams);

                    break;

                default:

                    break;

                    }

                    return false;

                }

            });

        }

    }

}

　　

activity_main.xml 文件

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

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

    package="com.example.performance"

    android:versionCode="1"

    android:versionName="1.0" >

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW"/>

    <uses-sdk

        android:minSdkVersion="26"

        android:targetSdkVersion="26" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service android:name=".FloatingService"/>

    </application>

</manifest>

AndroidManifest.xml 文件

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

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

    package="com.example.performance"

    android:versionCode="1"

    android:versionName="1.0" >

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW"/>

    <uses-sdk

        android:minSdkVersion="26"

        android:targetSdkVersion="26" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service android:name=".FloatingService"/>

    </application>

</manifest>