每次禁用设置权限时，活动都会重新启动 [英] Activity restart every time when disable permission from setting

问题描述

我正在开发具有以下结构的android应用程序:MainActivity-> FragmentA-> FragmentB-> Fragment C

I am developing an android app with structure: MainActivity->FragmentA->FragmentB->Fragment C

现在在片段C中，我转到权限设置"，然后将摄像机"的访问权限设置为拒绝"，然后返回一个应用程序.我意识到该应用已重新启动(转换为片段A).愿您给我任何理由和建议来解决它.

Now in Fragment C, I go to Permission Setting and make access Camera to Deny, then I return an App. I realize that app restarted (transit to Fragment A). May you give me any reason and suggestion to solve it.

推荐答案

当您从应用设置撤消权限时-活动将重新启动，所有组件也将重新启动.但是在onCreate(...)中，savedInstanceState不等于null.

When you revoke permissions from app settings - Activity restarts and all it's components too. But in onCreate(...) savedInstanceState doesn't equal to null.

因此您可以使用此类技巧:

Thus you can use such hack:

if(savedInstanceState！= null){

if (savedInstanceState != null) {

}

使用上述hack应用恢复上一个fragmentC.

Using the above hack app resume last fragmentC.

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