The third step: join the permissionsĪdd the following permissions to AndroidManifest.

L Then set the current position of the floating window through the updateViewLayout() method. I am getting following exception: Caused by: : Unable to add. L Set x, y through WindowManager.LayoutParams wmParams Hi, I try to run the sample application of this project. L Get the coordinates of the relative screen, that is, the top left corner of the screen as the originįloat y = event.getRawY()-25 //25 is the height of the system status bar We need to get the coordinate position of the ImageView. Then we want to achieve the drag effect of the floating window. In the previous step, we know that WindowManager can add, delete, and change the view. Step 2: Override the onTouchEvent method of ImageView

Thereby completing the entire communication process Window 。 Activity Will register the top control to Window Manager In the middle, when the user really touches the screen or the keyboard, Window Manager Will be notified, and when the control has some requests, it will also be via ViewParent Return to Window Manager in. It translates the user's actions into instructions and sends them to each of the interfaces presented on the interface. Window Manager Service It is global and unique. UpdateViewLayout () change the parameters of the view Public interface WindowManager implements ViewManager Exception that is thrown when calling addView(View, ViewGroup.LayoutParams) to a secondary display that cannot be found.

L Get instance of WM through getSystemService(Context.WINDOW_SERVICE).

L This interface is used to interact with the window manager (window manager, application framework layer). In this chapter, we will try to create a floating view on top of the current Activity. We can implement this function through the system service WindowManager. frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.Recently, some students have graduated design and want to use the floating window.

Windowmanager addview