android: Consolidate getPrefActivity into FragmentUtils

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
[Samuel: Changed static to non-static import]
Signed-off-by: Samuel Holland <samuel@sholland.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/app/src/main/java/com/wireguard/android/util/FragmentUtils.java b/app/src/main/java/com/wireguard/android/util/FragmentUtils.java
new file mode 100644
index 00000000..6e5ddee7
--- /dev/null
+++ b/app/src/main/java/com/wireguard/android/util/FragmentUtils.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2018 Harsh Shandilya <msfjarvis@gmail.com>
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+package com.wireguard.android.util;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import android.view.ContextThemeWrapper;
+
+import com.wireguard.android.activity.SettingsActivity;
+
+public class FragmentUtils {
+
+    public static SettingsActivity getPrefActivity(final Preference preference) {
+        final Context context = preference.getContext();
+        if (context instanceof ContextThemeWrapper) {
+            if (((ContextThemeWrapper) context).getBaseContext() instanceof SettingsActivity) {
+                return ((SettingsActivity) ((ContextThemeWrapper) context).getBaseContext());
+            }
+        }
+        return null;
+    }
+}