android 8.0 悬浮窗最简demo

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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>