android - 应该在方法结束时调用 Super

Question

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    ((CustomApplication) getApplication()).detach(this);    
}

在生成 PMD 报告时，我得到了这个错误:应该在方法结束时调用 Super。通常，您最终会将 super 方法保留在顶部(First Statement)，以便首先调用其父类进行初始化。

Answer 1

Normally you would eventually keep the super method at the top(First Statement) so that its parent class is first called initialized.

以下代码 fragment 向您展示了 Activity#onSaveInstanceState(Bundle outState) 的样子。你可以看到它只保存了你通过调用 super.onSaveInstanceState(outState); 作为参数传入的 Bundle。因此，在 Bundle 中实际保存内容之前调用 super 方法是没有意义的。

protected void onSaveInstanceState(Bundle outState) {
    outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState());
    Parcelable p = mFragments.saveAllState();
    if (p != null) {
        outState.putParcelable(FRAGMENTS_TAG, p);
    }
    getApplication().dispatchActivitySaveInstanceState(this, outState);
}