Add base/android/activity_status.cc

base/android/activity_status.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/android/activity_status.h"
+
+#include <jni.h>
+
+#include "base/memory/singleton.h"

[gavinp, 2013/04/26 07:37:53]

Not needed, the header already has this.

[digit1, 2013/04/26 12:32:40]

Done.

+#include "jni/ActivityStatus_jni.h"
+
+namespace base {
+namespace android {
+
+ActivityStatus::StateListener::StateListener() {
+  ActivityStatus::GetInstance()->RegisterStateListener(this);
+}
+
+ActivityStatus::StateListener::~StateListener() {
+  ActivityStatus::GetInstance()->UnregisterStateListener(this);
+}
+
+// static
+ActivityStatus* ActivityStatus::GetInstance() {
+  return Singleton
+      <ActivityStatus, LeakySingletonTraits<ActivityStatus> >::get();
+}
+
+ActivityStatus::ActivityStatus()

[gavinp, 2013/04/26 07:37:53]

Method order: methods in .cc files should be in the same order as in the .h
file.

[digit1, 2013/04/26 12:32:40]

Done.

+    : observers_(new ObserverListThreadSafe<StateListener>()) {
+  Java_ActivityStatus_registerThreadSafeNativeStateListener(
+      base::android::AttachCurrentThread());
+}
+
+void ActivityStatus::RegisterStateListener(StateListener* state_listener) {
+  observers_->AddObserver(state_listener);
+}
+
+void ActivityStatus::UnregisterStateListener(StateListener* state_listener) {
+  observers_->RemoveObserver(state_listener);
+}
+
+void ActivityStatus::OnActivityStateChange(ActivityState new_state) {
+  observers_->Notify(
+      &ActivityStatus::StateListener::OnActivityStateChange,
+      new_state);
+}
+
+static void OnActivityStateChange(JNIEnv* env, jclass clazz, int new_state) {
+  ActivityStatus* activity_status = ActivityStatus::GetInstance();
+  ActivityState activity_state = static_cast<ActivityState>(new_state);
+  activity_status->OnActivityStateChange(activity_state);
+}
+
+bool ActivityStatus::RegisterBindings(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace android
+}  // namespace base