From 77a6a631748b09737580af5134ae9bfc1730e5f9 Mon Sep 17 00:00:00 2001
From: Dennis Guse <dennis.guse@alumni.tu-berlin.de>
Date: Thu, 7 Nov 2019 19:41:29 +0100
Subject: [PATCH] Re-initialize PreferenceFragment, when sharedpreferences were
 reset.

---
 .../opentracks/settings/ResetDialogPreference.java | 14 ++++++++++++--
 .../opentracks/settings/SettingsActivity.java      | 12 +++++++++---
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/src/main/java/de/dennisguse/opentracks/settings/ResetDialogPreference.java b/src/main/java/de/dennisguse/opentracks/settings/ResetDialogPreference.java
index 6b7ff0caf..eca722534 100644
--- a/src/main/java/de/dennisguse/opentracks/settings/ResetDialogPreference.java
+++ b/src/main/java/de/dennisguse/opentracks/settings/ResetDialogPreference.java
@@ -5,6 +5,7 @@ import android.os.Bundle;
 import android.util.AttributeSet;
 import android.widget.Toast;
 
+import androidx.fragment.app.FragmentActivity;
 import androidx.preference.DialogPreference;
 import androidx.preference.PreferenceDialogFragmentCompat;
 
@@ -17,6 +18,10 @@ public class ResetDialogPreference extends DialogPreference {
         super(context, attrs);
     }
 
+    interface ResetCallback {
+        void onReset();
+    }
+
     public static class ResetPreferenceDialog extends PreferenceDialogFragmentCompat {
 
         static PreferenceDialogFragmentCompat newInstance(String preferenceKey) {
@@ -31,9 +36,14 @@ public class ResetDialogPreference extends DialogPreference {
         @Override
         public void onDialogClosed(boolean positiveResult) {
             if (positiveResult) {
-                PreferencesUtils.resetPreferences(getActivity(), true);
+                FragmentActivity activity = getActivity();
 
-                Toast.makeText(getActivity(), R.string.settings_reset_done, Toast.LENGTH_SHORT).show();
+                PreferencesUtils.resetPreferences(activity, true);
+                Toast.makeText(activity, R.string.settings_reset_done, Toast.LENGTH_SHORT).show();
+
+                if (activity instanceof ResetCallback) {
+                    ((ResetCallback) activity).onReset();
+                }
             }
         }
     }
diff --git a/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java b/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
index b24ede107..7f1f22c9d 100644
--- a/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
@@ -16,9 +16,9 @@ import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.StringUtils;
 
-public class SettingsActivity extends AppCompatActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller {
+public class SettingsActivity extends AppCompatActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller, ResetDialogPreference.ResetCallback {
 
-    private PrefsFragment prefsFragment = new PrefsFragment();
+    private PrefsFragment prefsFragment;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -30,7 +30,7 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
         toolbar.setTitle(R.string.menu_settings);
         setSupportActionBar(toolbar);
 
-        getSupportFragmentManager().beginTransaction().replace(R.id.settings_fragment, prefsFragment).commit();
+        onReset();
     }
 
     @Override
@@ -38,6 +38,12 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
         prefsFragment.setDefaultActivity(iconValue);
     }
 
+    @Override
+    public void onReset() {
+        prefsFragment = new PrefsFragment();
+        getSupportFragmentManager().beginTransaction().replace(R.id.settings_fragment, prefsFragment).commit();
+    }
+
     public static class PrefsFragment extends PreferenceFragmentCompat {
 
         /*