1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/android/activity_status.h" 6 7 #include <jni.h> 8 9 #include "base/memory/singleton.h" 10 #include "jni/ActivityStatus_jni.h" 11 12 namespace base { 13 namespace android { 14 15 ActivityStatus::Listener::Listener( 16 const ActivityStatus::StateChangeCallback& callback) 17 : callback_(callback) { 18 ActivityStatus::GetInstance()->RegisterListener(this); 19 } 20 21 ActivityStatus::Listener::~Listener() { 22 ActivityStatus::GetInstance()->UnregisterListener(this); 23 } 24 25 void ActivityStatus::Listener::Notify(ActivityState state) { 26 callback_.Run(state); 27 } 28 29 // static 30 ActivityStatus* ActivityStatus::GetInstance() { 31 return Singleton<ActivityStatus, 32 LeakySingletonTraits<ActivityStatus> >::get(); 33 } 34 35 static void OnActivityStateChange(JNIEnv* env, jclass clazz, int new_state) { 36 ActivityStatus* activity_status = ActivityStatus::GetInstance(); 37 ActivityState activity_state = static_cast<ActivityState>(new_state); 38 activity_status->OnActivityStateChange(activity_state); 39 } 40 41 bool ActivityStatus::RegisterBindings(JNIEnv* env) { 42 return RegisterNativesImpl(env); 43 } 44 45 ActivityStatus::ActivityStatus() 46 : observers_(new ObserverListThreadSafe<Listener>()) { 47 Java_ActivityStatus_registerThreadSafeNativeStateListener( 48 base::android::AttachCurrentThread()); 49 } 50 51 ActivityStatus::~ActivityStatus() {} 52 53 void ActivityStatus::RegisterListener(Listener* listener) { 54 observers_->AddObserver(listener); 55 } 56 57 void ActivityStatus::UnregisterListener(Listener* listener) { 58 observers_->RemoveObserver(listener); 59 } 60 61 void ActivityStatus::OnActivityStateChange(ActivityState new_state) { 62 observers_->Notify(&ActivityStatus::Listener::Notify, new_state); 63 } 64 65 } // namespace android 66 } // namespace base 67
