ensure that action bar subtitle remains after orientation changes for all fragments

1 files changed, 19 insertions, 0 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/base/utils/ViewHelper.java b/app/src/main/java/se/leap/bitmaskclient/base/utils/ViewHelper.java
index 23ca40e5..7410172f 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/utils/ViewHelper.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/utils/ViewHelper.java
@@ -3,6 +3,10 @@ package se.leap.bitmaskclient.base.utils;
 import android.content.Context;
 
 import androidx.annotation.DimenRes;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
 
 /**
  * Created by cyberta on 29.06.18.
@@ -14,4 +18,19 @@ public class ViewHelper {
         return context.getResources().getDimensionPixelSize(dimension);
     }
 
+    /**
+     * Sets the subtitle of an activities action bar. The activity needs to be an AppCompatActivity.
+     * @param fragment
+     * @param stringId
+     */
+    public static void setActionBarTitle(Fragment fragment, @StringRes int stringId) {
+        AppCompatActivity appCompatActivity = (AppCompatActivity) fragment.getActivity();
+        if (appCompatActivity != null) {
+            ActionBar actionBar = appCompatActivity.getSupportActionBar();
+            if (actionBar != null) {
+                actionBar.setSubtitle(stringId);
+            }
+        }
+    }
+
 }