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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。
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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();
}
}
@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;
}
@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);
}
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;
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (null ==floatView) {
return;
}
windowManager.removeView(floatView);
windowManager=null;
}
悬浮窗权限是Android提供的权限中的特殊权限,要申请后再使用,否则会导致弹框不能显示、程序崩溃等问题
有的文章说MIUI系统可设置为 WindowManager.LayoutParams.TYPE_TOAST 避开悬浮框权限的申请,我的实践经验是不要这样设置,否则利用参考文献中的方法操作后dialog还是显示不出来
Android 悬浮窗权限各机型各系统适配大全
Android悬浮窗及权限 by JustDo23
github项目
悬浮窗:
使用场景:例如微信在视频的时候,点击Home键,视频小窗口仍然会在屏幕上显示;
注意事项:
1、一般需要在后台进行操作的时候才需要悬浮窗,这样悬浮窗才有意义;
2、API Level = 23的时候,需要在AndroidManefest.xml文件中声明权限SYSTEM_ALERT_WINDOW才能在其他应用上绘制控件。
uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /;除了这个权限外,我们还需要在系统设置里面对本应用进行设置悬浮窗权限。该权限在应用中需要启动Settings.ACTION_MANAGE_OVERLAY_PERMISSION来让用户手动设置权限:startActivityForResult(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())), REQUEST_CODE);
3、LayoutParam设置:LayoutParam里的type变量。这个变量是用来指定窗口类型的。在设置这个变量时,需要注意一个坑,那就是需要对不同版本的Android系统进行适配。
if (Build.VERSION.SDK_INT = Build.VERSION_CODES.O) {
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
layoutParams.type = WindowManager.LayoutParams.TYPE_PHONE;
};在Android 8.0之前,悬浮窗口设置可以为TYPE_PHONE,这种类型是用于提供用户交互操作的非应用窗口。
而Android 8.0对系统和API行为做了修改,包括使用SYSTEM_ALERT_WINDOW权限的应用无法再使用一下窗口类型来在其他应用和窗口上方显示提醒窗口:
- TYPE_PHONE
- TYPE_PRIORITY_PHONE
- TYPE_SYSTEM_ALERT
- TYPE_SYSTEM_OVERLAY
- TYPE_SYSTEM_ERROR
如果需要实现在其他应用和窗口上方显示提醒窗口,那么必须该为TYPE_APPLICATION_OVERLAY的新类型;
如果在Android 8.0以上版本仍然使用TYPE_PHONE类型的悬浮窗口,则会出现如下异常信息:
android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@f8ec928 -- permission denied for window type 2002;
具体实现:
1、Activity:
public void startFloatingService(View view) {
...
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "当前无权限,请授权", Toast.LENGTH_SHORT);
startActivityForResult(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())), 0);
} else {
startService(new Intent(MainActivity.this, FloatingService.class));
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 0) {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "授权失败", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "授权成功", Toast.LENGTH_SHORT).show();
startService(new Intent(MainActivity.this, FloatingService.class));
}
}
}
2、service:
@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
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
// 新建悬浮窗控件
Button button = new Button(getApplicationContext());
button.setText("Floating Window");
button.setBackgroundColor(Color.BLUE);
// 设置LayoutParam
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_PHONE;
}
layoutParams.format = PixelFormat.RGBA_8888;
layoutParams.width = 500;
layoutParams.height = 100;
layoutParams.x = 300;
layoutParams.y = 300;
// 将悬浮窗控件添加到WindowManager
windowManager.addView(button, layoutParams);
}
}
效果展示: