Disabling Multi-window feature for Android N not working for an activity

Question

I want to disable multi-window support for an activity in my app. I have set resizeableActivity to false in my Manifest but when I long press recent app icon, the app still goes in multi-window mode. Below is my manifest:

<activity
    android:name=".MainActivity"
    android:resizeableActivity="false"
    android:excludeFromRecents="true"
    android:icon="@drawable/ic_launcher_home"
    android:theme="@style/AppThemeV3.CustomToolbar">
</activity>

Per documentation:

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

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.

I have also tried to set this attribute to false at application level in manifest but it still starts in multi-window mode. Any pointer on what I am doing wrong will be highly appreciated?

Ship

This activity does not have an <intent-filter>. How is it being started? Is it being started by one of your other activities? – Devaney

Hi, Yes its started internally by one of the other activity in the app. Thank you! – Ship

Answer 1

The activity that is at the root of the task controls the window size. Your choices are:

1. Trace back to all possible task root activities in your app and ensure they all also have android:resizeableActivity="false"

2. Force this activity into another task, via Intent flags when you start it or manifest settings

Devaney

Perfect...that fixed it. Thank you so much for your help!!! I had the flag set at application level but that did not work. When I set the flag at the root activity, that did the trick. Wondering why application level flag did not work? Thanks again!! – Ship

@user899849: That attribute is only for <activity> and does not appear in the documentation for <application>. – Devaney

It is worth saying that Intent.FLAG_ACTIVITY_NEW_TASK is notoriously buggy. So for others encountering this - you probably want to set the taskAffinity for the new activity to something different from the default. For example: <manifest ... <application ... <activity android:name="com.example.NoSplitActivity" android:screenOrientation="portrait" android:resizeableActivity="false" android:taskAffinity="com.example.NoSplitActivity" /> – Rivkarivkah

@Devaney - android:resizeableActivity=["true" | "false"] attribute is available at <application> level. Your fact is incorrect. I still don't understand what's the point of having an activity specific flag at application level? If mentioned at application level does it apply to all activities? – Sixpence

@AKh: "android:resizeableActivity=["true" | "false"] attribute is available at <application> level" -- they added it to the docs sometime after I wrote that comment. "If mentioned at application level does it apply to all activities?" -- yes. – Devaney

Answer 2

[UPDATE] set android:resizeableActivity="false" in application tag. This will work now.

Psalm

Answer 3

I have meet this problem before, and I try many time find that your must add android:launchMode="singleTask" && android:resizeableActivity="false" at the same time.

Debonair