Going to home screen programmatically

I want to go to the home screen programmatically in Android when the user clicks on button. How can this be done?

Solution 1:

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

Solution 2:

One line solution

moveTaskToBack(true); //activity.moveTaskToBack(true);

it will behave as Home Button is pressed

Solution 3:

Janusz's answer is great.

The only thing I want to add, which is a little too long for a comment, is that you can go to the home screen without having a reference to the current activity.

Janusz's code needs to be called from an Activity or Fragment due to startActivity(),

To get around this, you can store a static reference to your apps Context in your application file:

public class YourApplication extends Application
{

    private static Context mAppContext;

    public void onCreate()
    {
        super.onCreate();
        ...
        YourApplication.mAppContext = getApplicationContext();
    }

    public static Context getContext()
    {
        return mAppContext;
    }

}

Now you can send the user to the device home screen from any class in your app, not just Activities, Fragments, or other Classes with a reference to the current Activity (you can decide whether this is a good or bad thing):

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

Solution 4:

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