如何在片段中保存Recyclerview的滚动位置 [英] How to save scroll position of recyclerview in fragment

问题描述

我从这里得到了很多答案..但是没有一个答案可以解决我的问题..这就是为什么我要问这个问题.

I have followed so many answers from here.. but not a single one solving my issue .. that's why i am asking.

我想将滚动位置保存在一个片段中. 他们在很多文章中建议遵循

I want to save scroll position in a fragment. In So many articles they have suggested to follow

@Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
    }

和

@Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
    }

但这两种方法在片段中不可用.

But this two method is not available in fragment.

我的代码:

private int mPositionIng = RecyclerView.NO_POSITION;

private String KEY_POSITION_ING = "KeyPositionIng";

在OnCreateView()

in OnCreateView()

if (savedInstanceState != null) {

            if (savedInstanceState.containsKey(KEY_POSITION_ING)) {
                mPositionIng = savedInstanceState.getInt(KEY_POSITION_ING);
            }
}

覆盖片段中的方法它们与上面的方法不同.我不知道我在哪里做错了.

Override Methods in fragment They are not same method as above. i don't know where i am doing wrong.

@Override
    public void onSaveInstanceState(Bundle outState) {

        int scrollPositionIng = mRecyclerViewIngredients.computeVerticalScrollOffset();

        mPositionIng = scrollPositionIng;

        outState.putInt(KEY_POSITION_ING, mPositionIng);
        super.onSaveInstanceState(outState);
    }

@Override
    public void onViewStateRestored(@Nullable Bundle savedInstanceState) {

        if (mPositionIng != RecyclerView.NO_POSITION) {

            mRecyclerViewIngredients.getLayoutManager().scrollToPosition(mPositionIng);
        }


        super.onViewStateRestored(savedInstanceState);
    }

当方向改变时，我只需要保存滚动位置即可..请帮助. 任何建议将为您提供充分的帮助.谢谢...

I just need to save scroll position while the orientation changes .. Please help. Any Suggestion will be help full. Thanks......

推荐答案

让Android OS为您处理该问题，在所需标签活动内的AndroidManifest.xml中添加:

Let the Android OS handle that for you, in AndroidManifest.xml inside your wanted tag activity add:

android:configChanges="orientation|screenSize"

这篇关于如何在片段中保存Recyclerview的滚动位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！