From bc16a07c930b5005e98f5fcc2ab1a527afa78b18 Mon Sep 17 00:00:00 2001
From: Jeff Sharkey <jsharkey@android.com>
Date: Fri, 18 Dec 2015 17:19:27 -0700
Subject: [PATCH] Gracefully handle slowly appearing Home apps.

When starting a Guest user for the first time, it can take quite
awhile before the Home app enables itself.  So if we're unlocked
and no other Home app is around, chill for 500ms and see if someone
showed up.

Bug: 26267450
Change-Id: I3c4e01ae3681c650ea90b20ffc21835ae264b5e9
---
 src/com/android/settings/FallbackHome.java | 40 +++++++++++++++++++---
 1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/com/android/settings/FallbackHome.java b/src/com/android/settings/FallbackHome.java
index f92f2b2f131..d3e6482cd6e 100644
--- a/src/com/android/settings/FallbackHome.java
+++ b/src/com/android/settings/FallbackHome.java
@@ -21,25 +21,57 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.pm.ResolveInfo;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.UserManager;
 import android.util.Log;
 
+import java.util.Objects;
+
 public class FallbackHome extends Activity {
     private static final String TAG = "FallbackHome";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
         registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_USER_UNLOCKED));
+        maybeFinish();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        unregisterReceiver(mReceiver);
     }
 
     private BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
-            Log.d(TAG, "User unlocked; leaving to find real home");
-            unregisterReceiver(this);
-            finish();
+            maybeFinish();
+        }
+    };
+
+    private void maybeFinish() {
+        if (getSystemService(UserManager.class).isUserUnlocked()) {
+            final Intent homeIntent = new Intent(Intent.ACTION_MAIN)
+                    .addCategory(Intent.CATEGORY_HOME);
+            final ResolveInfo homeInfo = getPackageManager().resolveActivity(homeIntent, 0);
+            if (Objects.equals(getPackageName(), homeInfo.activityInfo.packageName)) {
+                Log.d(TAG, "User unlocked but no home; let's hope someone enables one soon?");
+                mHandler.sendEmptyMessageDelayed(0, 500);
+            } else {
+                Log.d(TAG, "User unlocked and real home found; let's go!");
+                finish();
+            }
+        }
+    }
+
+    private Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            maybeFinish();
         }
     };
 }