不廢話,四步走:
1、首先要聲明懸浮窗口權限:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW"/>
2、引導用戶打開懸浮窗權限:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!Settings.canDrawOverlays(this)) {
showTip("請先打開懸浮窗權限");
startActivityForResult(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())), 0);
} else {
//有權限了,可以用service或者直接用第三步開啓懸浮窗
}
}
3、初始化懸浮窗:
private void initFloatingWindow() {
if (Settings.canDrawOverlays(this)) {
// 獲取WindowManager服務
windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
//FloatView爲自定義的懸浮窗控件,亦可使用Button、ImageView之類的控件
floatView = new FloatView(getApplicationContext());
// 設置LayoutParam
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_PHONE;
}
// 實現懸浮窗可以移動的屬性(把這個值改成其他值可以操作懸浮窗底下的內容)
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
layoutParams.format = PixelFormat.TRANSPARENT;
layoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
layoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
layoutParams.gravity = Gravity.CENTER;
layoutParams.x = 0;
layoutParams.y = 0;
//todo
//對你的懸浮窗做一些點擊或移動事件的處理
}
}
layoutParams.flags的值選擇參考:https://www.jianshu.com/p/c91448e1c7d1
4、顯示和隱藏懸浮窗:
//顯示懸浮窗(添加懸浮窗控件)
windowManager.addView(floatView, layoutParams);
//隱藏懸浮窗(移除懸浮窗控件)
windowManager.removeView(floatView);
//更新懸浮窗控件佈局(對懸浮窗做修改之後調用)
windowManager.updateViewLayout(floatView, layoutParams);
至於懸浮控件的移動,懸浮窗控件設置一個OnTouchListener事件:
floatView.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;
// 更新懸浮窗控件佈局
windowManager.updateViewLayout(floatView, layoutParams);
break;
default:
break;
}
return false;
}
});
但是這樣實現的卻是整屏控制懸浮窗的移動,並不能很好的實現在懸浮窗上面拖動的效果,這個我還得再研究研究,也望各位大佬指點指點。
完。