1 // Copyright 2014 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 #ifndef CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_ 6 #define CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_ 7 8 #include "build/build_config.h" 9 10 #if defined(OS_ANDROID) 11 #include "base/android/scoped_java_ref.h" 12 #endif 13 14 #include "content/browser/battery_status/battery_status_service.h" 15 16 namespace content { 17 18 // Platform specific manager class for fetching battery status data. 19 class CONTENT_EXPORT BatteryStatusManager { 20 public: 21 explicit BatteryStatusManager( 22 const BatteryStatusService::BatteryUpdateCallback& callback); 23 virtual ~BatteryStatusManager(); 24 25 // Start listening for battery status changes. New updates are signalled 26 // by invoking the callback provided at construction time. 27 virtual bool StartListeningBatteryChange(); 28 29 // Stop listening for battery status changes. 30 virtual void StopListeningBatteryChange(); 31 32 #if defined(OS_ANDROID) 33 // Must be called at startup. 34 static bool Register(JNIEnv* env); 35 36 // Called from Java via JNI. 37 void GotBatteryStatus(JNIEnv*, jobject, jboolean charging, 38 jdouble charging_time, jdouble discharging_time, 39 jdouble level); 40 #endif 41 42 protected: 43 BatteryStatusManager(); 44 BatteryStatusService::BatteryUpdateCallback callback_; 45 46 private: 47 #if defined(OS_ANDROID) 48 // Java provider of battery status info. 49 base::android::ScopedJavaGlobalRef<jobject> j_manager_; 50 #endif 51 52 DISALLOW_COPY_AND_ASSIGN(BatteryStatusManager); 53 }; 54 55 } // namespace content 56 57 #endif // CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_ 58
