From 037d10a7db3ca75a60ad5e238a29ab693c71100f Mon Sep 17 00:00:00 2001
From: Anton Chekulaev <metaphore@bk.ru>
Date: Thu, 17 Sep 2020 15:11:05 +1000
Subject: [PATCH] Back button for the base action bar activity.

---
 .../securesms/BaseActionBarActivity.java         | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/org/thoughtcrime/securesms/BaseActionBarActivity.java b/src/org/thoughtcrime/securesms/BaseActionBarActivity.java
index 17e06dfea0..07af397071 100644
--- a/src/org/thoughtcrime/securesms/BaseActionBarActivity.java
+++ b/src/org/thoughtcrime/securesms/BaseActionBarActivity.java
@@ -12,6 +12,7 @@ import android.os.Build;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBar;
 import androidx.core.app.ActivityCompat;
 import androidx.core.app.ActivityOptionsCompat;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
@@ -42,6 +43,13 @@ public abstract class BaseActionBarActivity extends AppCompatActivity {
     if (BaseActivity.isMenuWorkaroundRequired()) {
       forceOverflowMenu();
     }
+
+    ActionBar actionBar = getSupportActionBar();
+    if (actionBar != null) {
+      actionBar.setDisplayHomeAsUpEnabled(true);
+      actionBar.setHomeButtonEnabled(true);
+    }
+
     super.onCreate(savedInstanceState);
   }
 
@@ -69,6 +77,14 @@ public abstract class BaseActionBarActivity extends AppCompatActivity {
     LocalBroadcastManager.getInstance(this).registerReceiver(broadcastReceiver, new IntentFilter("unexpectedDeviceLinkRequestReceived"));
   }
 
+  @Override
+  public boolean onSupportNavigateUp() {
+    if (super.onSupportNavigateUp()) return true;
+
+    onBackPressed();
+    return true;
+  }
+
   @Override
   protected void onDestroy() {
     LocalBroadcastManager.getInstance(this).unregisterReceiver(broadcastReceiver);