如何創建像Facebook Messenger一樣的聊天頭和窗口? [英]How to create chathead and window exactly like facebook messenger?
當應用程序未運行時處理 android 推送通知,如 whatsapp、twitter、facebook、instagram 等 [英]Handle android push notification when app is not running like whatsapp, twitter, facebook, instagram etc
Android 中是否有類似 Apple Push Notification Service 的推送通知服務? [英]Is there any push notification service in Android like Apple Push Notification Service?