FloatService：
package com.home.floatwindow;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import com.home.testfolatwindow.R;
public class FloatService extends Service {
private WindowManager wm;
private WindowManager.LayoutParams wmlp;
private LinearLayout layout;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
createFloatView();
}
private void createFloatView() {
wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
wmlp = new WindowManager.LayoutParams();
wmlp.type = LayoutParams.TYPE_PHONE;
// 设置图片格式，效果为背景透明
wmlp.format = PixelFormat.RGBA_8888;
// 设置浮动窗口不可聚焦
wmlp.flags = LayoutParams.FLAG_NOT_FOCUSABLE;
wmlp.gravity = Gravity.LEFT | Gravity.TOP;
wmlp.x = 0;
wmlp.y = 0;
wmlp.width = WindowManager.LayoutParams.WRAP_CONTENT;
wmlp.height = WindowManager.LayoutParams.WRAP_CONTENT;
layout = getLayout();
wm.addView(layout, wmlp);
layout.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
ImageView iv = (ImageView) layout.findViewById(1);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.i("onClick", "onClick");
}
});
iv.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// getRawX是触摸位置相对于屏幕的坐标，getX是相对于按钮的坐标
wmlp.x = (int) event.getRawX() - layout.getMeasuredWidth() / 2;
// 减25为状态栏的高度
wmlp.y = (int) event.getRawY() - layout.getMeasuredHeight() / 2
- 25;
wm.updateViewLayout(layout, wmlp);
return false;
}
});
}
private LinearLayout getLayout() {
LinearLayout layout = new LinearLayout(this);
ImageView iv = new ImageView(this);
iv.setBackgroundResource((R.drawable.ic_launcher));
iv.setId(1);
layout.addView(iv);
return layout;
}
@Override
public void onDestroy() {
super.onDestroy();
if (layout != null) {
// 移除悬浮窗口
wm.removeView(layout);
}
}
}
权限：
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />