android Java.lang.IllegalStateException: No activity 解决方法

一直向钱

于 2017-03-03 16:22:41 发布

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本文链接：https://blog.youkuaiyun.com/u013519290/article/details/60141905

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本文针对Android应用中出现的Java.lang.IllegalStateException异常，提供了一种有效的解决方案。通过重写Fragment的onDetach()方法并释放mChildFragmentManager引用，可以避免FragmentManager在特定情况下的崩溃。

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错误如日志如下

/**

* Java.lang.IllegalStateException: No
* activity at
* Android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1075)
* at
* android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1070)
* at
* android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1861)
* at
* android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1474)
* at
* android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
* at
* android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)

解决方法是：在所在每个Fragment里重写如下方法解决

@Override
public void onDetach() {
super.onDetach();
try {
Field childFragmentManager = Fragment.class.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);

} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}

}