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Windowmanager java how to#
Windowmanager java android#
Windowmanager java code#
Windowmanager java windows#

The next bit of code adds a blank label to the frame content pane.

See Responding to Window-Closing Events for more information.

This behavior is appropriate for this program because the program has only one frame, and closing the frame makes the program useless. The EXIT_ON_CLOSE operation exits the program when your user closes the frame.

Next the code specifies what happens when your user closes the frame.

The other frequently used JFrame constructor is the no-argument constructor.

The first line of code creates a frame using a constructor that lets you set the frame title.

Create components and put them in the frame.įrame.getContentPane().add(emptyLabel, BorderLayout.CENTER) Optional: What happens when the frame closes?įtDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

Windowmanager java how to#

The following FrameDemo code shows how to create and set up a frame. Here is a picture of the extremely plain window created by the FrameDemo demonstration application. To make a window that appears within another window, use an internal frame. To make a window that is dependent on another window disappearing when the other window is iconified, for example use a dialog instead of frame. Applications with a GUI usually include at least one frame. JFrame class, is a window that has decorations such as a border, a title, and supports button components that close or iconify the window. Since the border area is included in the overall size of the frame, the border effectively obscures a portion of the frame, constraining the area available for rendering and/or displaying subcomponents to the rectangle which has an upper-left corner location of (insets.left, insets.top), and has a size of width - (insets.left + insets.right) by height - (insets.top + insets.bottom).Ī frame, implemented as an instance of the The dimensions of the border area may be obtained using the getInsets method. The size of the frame includes any area designated for the border.

Windowmanager java android#

Moreover, TYPE_SYSTEM_ERROR and some few type is deprecated in android api 26.A Frame is a top-level window with a title and a border. WindowManager windowManager = (WindowManager)getSystemService(WINDOW_SERVICE) įor this to work, you will need to add the following permission to your AndroidManifest.xml įor android api version > 23, _ALERT_WINDOW need to request runtime.

Define the position of the window within the screen Make the underlying application window visible through any transparent parts Display it on top of other application windows, but only for the current user Shrink the window to wrap the content rather than filling the screen For example: WindowManager.LayoutParams p = new WindowManager.LayoutParams( Instead you need to display a window from a background service.

If you want to create a floating window that is visible in front of other applications, you can't use an activity because your activity will stop when another app comes to the foreground, and its window will be hidden or destroyed.

Windowmanager java windows#

So normally you don't need to worry about windows - you just create an activity and Android will do the rest for you.īut you need to interact with the WindowManager if you want to do something unusual like create floating windows that don't fill the screen. The default window fills the screen, so that your activity's window hides any other activities - the WindowManager will display whichever window is on top. When you call setContentView on an activity, it attaches that view to the activity's default window. Among other things, it automatically performs window transitions and animations when opening or closing an app or rotating the screen.Įvery activity has a Window that is used to display its content on the screen. The Android WindowManager is a system service, which is responsible for managing the z-ordered list of windows, which windows are visible, and how they are laid out on screen.