From fc0df84eddd97ee1f23226632d6470f6e7096d86 Mon Sep 17 00:00:00 2001
From: topjohnwu <topjohnwu@gmail.com>
Date: Mon, 8 Apr 2019 15:36:44 -0400
Subject: [PATCH] Keep track of foreground activity

---
 .../main/java/com/topjohnwu/magisk/App.java   | 37 ++++++++++++++++++-
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/topjohnwu/magisk/App.java b/app/src/main/java/com/topjohnwu/magisk/App.java
index da3535832..293975b30 100644
--- a/app/src/main/java/com/topjohnwu/magisk/App.java
+++ b/app/src/main/java/com/topjohnwu/magisk/App.java
@@ -1,13 +1,19 @@
 package com.topjohnwu.magisk;
 
+import android.app.Activity;
 import android.app.Application;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.AsyncTask;
 import android.os.Build;
+import android.os.Bundle;
 import android.preference.PreferenceManager;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.topjohnwu.magisk.components.BaseActivity;
 import com.topjohnwu.magisk.database.MagiskDB;
 import com.topjohnwu.magisk.database.RepoDatabaseHelper;
 import com.topjohnwu.magisk.utils.LocaleManager;
@@ -17,7 +23,7 @@ import com.topjohnwu.superuser.Shell;
 
 import java.util.concurrent.ThreadPoolExecutor;
 
-public class App extends Application {
+public class App extends Application implements Application.ActivityLifecycleCallbacks {
 
     public static App self;
     public static Context deContext;
@@ -27,6 +33,7 @@ public class App extends Application {
     public SharedPreferences prefs;
     public MagiskDB mDB;
     public RepoDatabaseHelper repoDB;
+    public BaseActivity foreground;
 
     static {
         Shell.Config.setFlags(Shell.FLAG_MOUNT_MASTER | Shell.FLAG_USE_MAGISK_BUSYBOX);
@@ -41,6 +48,7 @@ public class App extends Application {
         super.attachBaseContext(base);
         self = this;
         deContext = base;
+        registerActivityLifecycleCallbacks(this);
 
         if (Build.VERSION.SDK_INT >= 24) {
             deContext = base.createDeviceProtectedStorageContext();
@@ -55,8 +63,33 @@ public class App extends Application {
     }
 
     @Override
-    public void onConfigurationChanged(Configuration newConfig) {
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         LocaleManager.setLocale(this);
     }
+
+    @Override
+    public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle bundle) {}
+
+    @Override
+    public void onActivityStarted(@NonNull Activity activity) {}
+
+    @Override
+    public void onActivityResumed(@NonNull Activity activity) {
+        foreground = (BaseActivity) activity;
+    }
+
+    @Override
+    public void onActivityPaused(@NonNull Activity activity) {
+        foreground = null;
+    }
+
+    @Override
+    public void onActivityStopped(@NonNull Activity activity) {}
+
+    @Override
+    public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle bundle) {}
+
+    @Override
+    public void onActivityDestroyed(@NonNull Activity activity) {}
 }