android系统级悬浮球的实现流程
当我们在使用的app的时候，如果需要实时观测到某个功能的实时进度并且不影响其他的操作的时候或者不影响使用其他应用的时候，系统级的悬浮球是个非常不错的选择。
首先我们需要创建一条Service服务用来承载悬浮球。
public class QueueUpFloatService extends Service {
/**
* 启动服务并传值
*
* @param activity 启动服务的activity
* @param modeBean 数据对象
*/
public static void launchService(Activity activity, ModeBean modeBean) {
try {
Intent intent =new Intent(activity, QueueUpFloatService.class);
Bundle bundle =new Bundle();
bundle.putSerializable(KEY_MODEL, modeBean);
intent.putExtras(bundle);
activity.startService(intent);
}catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
在onCreate中初始化WindowManager 并声明相关属性
@Override
public void onCreate() {
super.onCreate();
//加一点简单的动画
buttonScale = (ScaleAnimation) AnimationUtils.loadAnimation(this, R.anim.anim_float);
windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
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;
}
layoutParams.format = PixelFormat.RGBA_8888;
layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
layoutParams.width = ScreenUtils.dp2px(66);
layoutParams.height = ScreenUtils.dp2px(66);
layoutParams.x = ScreenUtils.getRealWidth() - ScreenUtils.dp2px(60);
layoutParams.y = ScreenUtils.deviceHeight() *2 /3;
}
在onStartCommand中初始化view 并添加到windowManager中
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
ModeBean modeBean = (ModeBean) intent.getExtras().getSerializable(KEY_MODEL);
LayoutInflater layoutInflater = LayoutInflater.from(this);
floatView = layoutInflater.inflate(R.layout.view_float, null);
RelativeLayout rlFloatParent =floatView.findViewById(R.id.rl_float_parent);
rlFloatParent.startAnimation(buttonScale);
TextView tvIndex =floatView.findViewById(R.id.tv_queue_index);
tvIndex.setText(modeBean.title);
floatView.findViewById(R.id.iv_close_float).setOnClickListener(v -> stopSelf());
//修改悬浮球的滑动实现
floatView.setOnTouchListener(new FloatingOnTouchListener());
windowManager.addView(floatView, layoutParams);
return super.onStartCommand(intent, flags, startId);
}
悬浮球试图的滑动监听实现
private class FloatingOnTouchListenerimplements View.OnTouchListener {
private int x;
private int y;
private long downTime;
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
downTime = System.currentTimeMillis();
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;
windowManager.updateViewLayout(view, layoutParams);
break;
case MotionEvent.ACTION_UP:
/* *
* 这里根据手指按下和抬起的时间差来判断点击事件还是滑动事件
* */
if ((System.currentTimeMillis() -downTime) <200) {
//检测应用在前台还是后台
if (AppUtils.isAppIsInBackground()) {
AppUtils.moveToFront(CloseActivityUtils.activityList.get(CloseActivityUtils.activityList.size() -1).getClass());
} else {
//检测栈顶是否为SecondActivity 不是就打开SecondActivity
if (!CloseActivityUtils.activityList.get(CloseActivityUtils.activityList.size() -1)
.getClass().getSimpleName().contains("SecondActivity")) {
SecondActivity.launchActivity(CloseActivityUtils.activityList.get(CloseActivityUtils.activityList.size() -1));
}
}
}
break;
default:
break;
}
return false;
}
}
在service的onDestory方法中移除视图，即关闭服务，的时候移除视图
@Override
public void onDestroy() {
super.onDestroy();
if (null ==floatView) {
return;
}
windowManager.removeView(floatView);
windowManager=null；
}