1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.car.messenger.impl;
18 
19 import android.app.Application;
20 import android.os.Handler;
21 
22 import androidx.annotation.NonNull;
23 import androidx.annotation.Nullable;
24 
25 import com.android.car.messenger.core.util.L;
26 
27 import java.lang.Thread.UncaughtExceptionHandler;
28 
29 /** The application object */
30 public class CarMessengerApp extends Application implements UncaughtExceptionHandler {
31     @Nullable private static UncaughtExceptionHandler sSystemUncaughtExceptionHandler;
32 
33     @Override
onCreate()34     public void onCreate() {
35         super.onCreate();
36         AppFactoryImpl.register(this);
37         sSystemUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
38         Thread.setDefaultUncaughtExceptionHandler(this);
39     }
40 
41     @Override
onLowMemory()42     public void onLowMemory() {
43         super.onLowMemory();
44         L.d("onLowMemory");
45     }
46 
47     @Override
uncaughtException(final Thread thread, final Throwable ex)48     public void uncaughtException(final Thread thread, final Throwable ex) {
49         final boolean background = getMainLooper().getThread() != thread;
50         if (background) {
51             L.e("Uncaught exception in background thread " + thread, ex);
52             final Handler handler = new Handler(getMainLooper());
53             handler.post(() -> nullSafeUncaughtException(thread, ex));
54         } else {
55             nullSafeUncaughtException(thread, ex);
56         }
57     }
58 
nullSafeUncaughtException(@onNull Thread thread, @NonNull Throwable ex)59     private static void nullSafeUncaughtException(@NonNull Thread thread, @NonNull Throwable ex) {
60         if (sSystemUncaughtExceptionHandler != null) {
61             sSystemUncaughtExceptionHandler.uncaughtException(thread, ex);
62         }
63     }
64 }
65