How to Configuring App for Multi-Window Mode?

In android Multi-Window Support , how to configure app for multi-window mode?

Which attribute need to set in manifest's activity or application node to enable or disable multi-window display?

The minimum requirement to enable multi-window for a specific activity (or the entire application) is to add the resizeableActivity=true parameter to the <activity> (or <application>) tag.

Here is an overview of the Android Developers' Multi-Window Support guide:

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If your app targets Android N, you can configure how and whether your app's activities support multi-window display. You can set attributes in your manifest to control both size and layout. A root activity's attribute settings apply to all activities within its task stack. For example, if the root activity has android:resizeableActivity set to true, then all activities in the task stack are resizeable.

Note: If you build a multi-orientation app with a version of the SDK lower than Android N, and the user uses the app in multi-window mode, the system forcibly resizes the app. The system presents a dialog box warning the user that the app may behave unexpectedly. The system does not resize fixed-orientation apps; if the user attempts to open a fixed-orientation app under multi-window mode, the app takes over the whole screen.

• android:resizeableActivity

Set this attribute in your manifest's activity or application node to enable or disable multi-window display:

android:resizeableActivity=["true" | "false"]

If this attribute is set to true, the activity can be launched in split-screen and freeform modes. If the attribute is set to false, the activity does not support multi-window mode. If this value is false, and the user attempts to launch the activity in multi-window mode, the activity takes over the full screen.

If your app targets Android N, but you do not specify a value for this attribute, the attribute's value defaults to true.

• android:supportsPictureInPicture

Set this attribute in your manifest's activity node to indicate whether the activity supports picture-in-picture display. This attribute is ignored if android:resizeableActivity is false.

android:supportsPictureInPicture=["true" | "false"]

Layout attributes

With Android N, the layout manifest element supports several attributes that affect how an activity behaves in multi-window mode:

• android:defaultWidth

  Default width of the activity when launched in freeform mode.

• android:defaultHeight

  Default height of the activity when launched in freeform mode.

• android:gravity

  Initial placement of the activity when launched in freeform mode. See the Gravity reference for suitable values.

• android:minHeight, android:minWidth

  Minimum height and minimum width for the activity in both split-screen and freeform modes. If the user moves the divider in split-screen mode to make an activity smaller than the specified minimum, the system crops the activity to the size the user requests.

For example, the following code shows how to specify an activity's default size and location, and its minimum size, when the activity is displayed in freeform mode:

<activity android:name=".MyActivity">
<layout android:defaultHeight="500dp"
      android:defaultWidth="600dp"
      android:gravity="top|end"
      android:minHeight="450dp"
      android:minWidth="300dp" />