How to Launch Home Screen Programmatically in Android

Going to home screen programmatically

You can do this through an Intent.

Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);

This Intent will start the launcher application that the user has defined. Be careful with this because this will look like your application crashed if the user does not expect this.

If you want this to build an exit button from your app please read this article on exit Buttons in Android

How to open Default Home App screen intent on Android

PackageManager packageManager = activity.getPackageManager();
ComponentName componentName = new ComponentName(activity, YourLauncher.class);
packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME)
        .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
activity.startActivity(intent);
activity.finishAndRemoveTask();

and launcher activity in the manifest:

        <activity
        ...
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.HOME" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

How to go to the default home screen of Android programatically?

Try this:

Intent homeIntent= new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_HOME);
homeIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(homeIntent);

How to programmatically launch a specific home page in android

Not with the default Home screen.

Tucked away in the Launcher Activity source (at https://android.googlesource.com/platform/packages/apps/Launcher/+/master/src/com/android/launcher/Launcher.java#822) is this chunk of code (see line 822):

if (!mWorkspace.isDefaultScreenShowing()) {
    mWorkspace.moveToDefaultScreen();
}

So it is not possible to specify the specific page.

Yet another android show home screen programmatically

Ok, so I haven't solved the actual two problems in the post, which is related to programming. However, I have solved what I wanted to do (ref backstory).

So basically what I did was to install tasker and tasker app factory. In tasker I made a task to show the home screen. Also here it needs to be executed twice to go to the "home-home screen". Add a delay of 100 ms between the two. It looks very smooth. No windows are popping up and it's a nice smooth transition from what ever app you reside in, to the home screen, then it glides to the "home-home screen". Export this task and configure the smart button to run this when the smart button is clicked.

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