Android: How to reset FirstRun SharedPreferences when my app is updated?

Question

My app copies files over from res/raw to the sdcard on first run. I want it to update those files on every subsequent app update. How can i have it reset the firstrun prefer

Answer 1

Run this in the MainActivity's OnCreate

public void onUpdateFirstRun () {
    SharedPreferences prefs  = PreferenceManager.getDefaultSharedPreferences(this);
    PackageInfo pInfo;

    try {
        pInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_META_DATA);

        Log.d("VersionCode", pInfo.versionCode + " ");
        if (prefs.getLong(LAST_RUN_VERSION_CODE_KEY, 0) < pInfo.versionCode) {

            if (!isInitializedInSP(KEY)) {

                editor.putString(KEY, "");
            }

            //Finalize and Save
            editor.putLong(LAST_RUN_VERSION_CODE_KEY, pInfo.versionCode);
            editor.apply();

        }
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
}

Use method to check if you had already initialized it in previous version

public static boolean isInitializedInSP (String key) {
    SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContex());
    Object o = mPrefs.getAll().get(key);

    if (o != null) {
        return true;
    }
    else  {
        return false;
    }

}