How to programmatically clear application data

Question

You can use the package-manager tool to clear data for installed apps (similar to pressing the 'clear data' button in the app settings on your device). So using adb you could do:

adb shell pm clear my.wonderful.app.package

Following up to @edovino's answer, the way of clearing all of an application's preferences programmatically would be

private void clearPreferences() {
    try {
        // clearing app data
        Runtime runtime = Runtime.getRuntime();
        runtime.exec("pm clear YOUR_APP_PACKAGE_GOES HERE");

    } catch (Exception e) {
        e.printStackTrace();
    }
}

Warning: the application will force close.

you can clear SharedPreferences app-data with this

Editor editor = 
context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
editor.clear();
editor.commit();

and for clearing app db, this answer is correct -> Clearing Application database

From API version 19 it is possible to call ActivityManager.clearApplicationUserData().

((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)).clearApplicationUserData();