Properly clear the label cache when changing isMultiUser setting

Author: infinity0

app/src/main/java/dev/ukanth/ufirewall/Api.java

@@ -169,6 +169,7 @@ public final class Api {
     public static final int NOTIFICATION_ID = 1;
     public static final String PREF_FIREWALL_STATUS = "AFWallStaus";
     public static final String DEFAULT_PREFS_NAME = "AFWallPrefs";
+    public static final String CACHE_PREFS_NAME = "AFWallCache";
     //for import/export rules
     //revertback to old approach for performance
     public static final String PREF_3G_PKG_UIDS = "AllowedPKG3G_UIDS";
@@ -1396,8 +1397,7 @@ public static List<PackageInfoData> getApps(Context ctx, GetAppList appList) {
         }
         //revert back to old approach
 
-        //always use the defaul preferences to store cache value - reduces the application usage size
-        SharedPreferences cachePrefs = ctx.getSharedPreferences(DEFAULT_PREFS_NAME, Context.MODE_PRIVATE);
+        SharedPreferences cachePrefs = ctx.getSharedPreferences(CACHE_PREFS_NAME, Context.MODE_PRIVATE);
 
         int count = 0;
         try {

app/src/main/java/dev/ukanth/ufirewall/preferences/ExpPreferenceFragment.java

@@ -7,6 +7,7 @@
 import android.app.Activity;
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
@@ -149,6 +150,11 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
             } else {
                 Api.setUserOwner(this.getActivity().getApplicationContext());
             }
+            final Context ctx = getActivity().getApplicationContext();
+            SharedPreferences cachePrefs = ctx.getSharedPreferences(Api.CACHE_PREFS_NAME, Context.MODE_PRIVATE);
+            Editor edit = cachePrefs.edit();
+            edit.clear();
+            edit.apply();
         }
     }