android intent - How to replace default launcher by my app in Google certified device - Stack Overflow

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We are implementing an app that is having a WebView and load a website. And this app is implemented as a launcher app, and we don't want the user to go to any other launcher. (This is for STB devices and not for mobile and will not be added to Play store). Our app will open a set of installed apps in the device as well. And we were able to switch back to our app when press back button from those apps. The only question is with the Home button now.

Even though the intent category is set to **DEFAULT **in the manifest, we are not able to set this app as the default launcher of a Google certified devices.

The same app is **able **to set as the default launcher at the first Home button press in devices that are not Google certified.

Our requirement is that whenever user presses the Home button from the remote, it should go to our app home and not the system launcher. Android version is 12.

We don't have root permission to the device (it is Google certified device). How can we do this?

Following is the manifest extract

<activity
            android:name="com.myapp.MainActivity"
            android:alwaysRetainTaskState="true"
            android:launchMode="singleTask"
            android:clearTaskOnLaunch="false"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
            android:configChanges="keyboardHidden|orientation|screenSize"
            android:exported="true">
            <intent-filter android:priority="1000">
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.HOME" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

And starting intent as follow

Intent i = new Intent(Intent.ACTION_MAIN);
i.setComponent(new Component("com.myapp", "com.myapp.MainActivity"));
i.addCategory(Intent.CATEGORY_HOME);
i.addCategory(Intent.CATEGORY_DEFAULT);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);

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