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Can not perform this action afte

2021-05-12  本文已影响0人  支离破碎_SuperLee

如何解决Can not perform this action after onSaveInstanceState

先分析问题发生原因

```

private void checkStateLoss() {

    if (isStateSaved()) {

        throw new IllegalStateException(

        "Can not perform this action after onSaveInstanceState");

    }

}

public boolean isStateSaved() {

    // See saveAllState() for the explanation of this.  We do this for

    // all platform versions, to keep our behavior more consistent between

    // them.

    return mStateSaved ||mStopped;

}

```

通过分析源码我们找到,当activity执行了onSaveInstanceState或onStop方法后,操作子fragment系统会检测当前状态并抛出异常。

解决方法:

配合Lifecycle,我们只需要重写添加:

```

lifecycleScope?.launchWhenResumed{

    //show fragment dialog

}

```

这样即使是activity在后台情况下返回前台,也会立即弹窗。

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