How to get variable from PreferenceActivity to MainActivity?

Question

This question seems dumb, but I just cant figure out how to get the boolean, which is set by a CheckBoxPreference in the SettingsActivity, to my MainActivity.

CheckBoxPreference:

<CheckBoxPreference
   android:defaultValue="true"
   android:key="check_box_show_idle_dialog"
   android:title="Show welcome dialog" />

SettingsActivity:

import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import androidx.appcompat.app.AppCompatActivity;

public class SettingsActivity extends AppCompatActivity {

   public static final String KEY_PREF_CHECK_BOX_SHOW_IDLE_DIALOG = "check_box_show_idle_dialog";

   Boolean show_idle_dialog;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      getSupportFragmentManager().beginTransaction()
         .replace(android.R.id.content, new SettingsFragment())
         .commit();

      SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

      //Switch Dark Mode
      show_idle_dialog  = sharedPreferences.getBoolean(SettingsActivity.KEY_PREF_CHECK_BOX_SHOW_IDLE_DIALOG, true);
   }
}

What do I have to change in order to grab the variable in the MainActivity? I haven't attached it, because literally could not find a single piece of code, which worked for me. Maybe it was just the wrong search terms. I would be very happy if someone has got a solution.

I don't know how to transfer the value of "show_idle_dialog" to the MainActivity? Is it just like every other variable? If yes, do I just go with the Intent putExtra? — BlazeCodeDev, Dec 18 '19 at 10:04
You can use the same code in every activity to get a value from shared preferences for a variable like `show_idle_dialog`. — blackapps, Dec 18 '19 at 10:24
Oh, I didnt know that ,nevertheless it just outputs the defaultValue in the MainActivity. — BlazeCodeDev, Dec 18 '19 at 15:38

How to get variable from PreferenceActivity to MainActivity?

0 Answers0