Facebook Chat Heads如何实现？ [英] How is Facebook Chat Heads implemented?

问题描述

Facebook Android Messenger应用具有称为聊天头的功能。它在其他应用程序的顶部放置一个聊天图标和窗口。这是如何实现的？使用哪些Android API？

The Facebook Android Messenger application has a feature called Chat Heads. It lays a chat icon and window over the top of other applications. How is this achieved? Which Android APIs are used?

推荐答案

搜索权限 android.permission.SYSTEM_ALERT_WINDOW 和 WindowManager.LayoutParams.TYPE_SYSTEM_ALERT 。

请参阅丹尼尔·扬科夫斯基（Daniel Jankowski）的应用/？utm_source = androiddevdigest =nofollow noreferrer>此博客 >及其在GitHub上的 WindowHead示例。

See this blogpost by Daniel Jankowski and his WindowHead sample on GitHub.

除了已经列出的重复答案外，还请参阅：

In addition to the duplicate answer already listed, also see:

• 应用程序运行在其他应用程序之上


• 消失的Facebook聊天头

• Having application running above other app
• Disappearing facebook chat heads

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