android-打开键盘时,Recyclerview不会滚动到结尾

我在应用程序中使用recylerview,并且每当将新元素添加到recyclerview时,它都会通过使用滚动到最后一个元素

recyclerView.scrollToPosition(adapter.getCount());

但是,每当键盘打开时(由于editTextView),它都会调整视图的大小,并且recyclerview会变小,但是无法滚动到最后一个元素。

android:windowSoftInputMode="adjustResize"

我什至尝试使用以下代码滚动到最后一个元素,但是没有用

editTextView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if(hasFocus){
                recyclerView.scrollToPosition(chatAdapter.getItemCount());
            }
        }
    });

我可以尝试adjustPan向上移动平移锅,但是它隐藏了我的工具栏。请提出任何纠正问题的方法。

10个解决方案
62 votes

您可以使用recyclerview.addOnLayoutChangeListener()捕捉键盘变化。如果底部小于oldBottom,则键盘处于向上状态。

if ( bottom < oldBottom) { 
   recyclerview.postDelayed(new Runnable() { 
       @Override 
       public void run() {
           recyclerview.scrollToPosition(bottomPosition); 
       }
    }, 100);
}
jihoon kim answered 2020-02-14T05:09:07Z
50 votes

将此添加到您的活动或片段中:

    if (Build.VERSION.SDK_INT >= 11) {
        recyclerView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
            @Override
            public void onLayoutChange(View v,
                    int left, int top, int right, int bottom,
                    int oldLeft, int oldTop, int oldRight, int oldBottom) {
                if (bottom < oldBottom) {
                    recyclerView.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            recyclerView.smoothScrollToPosition(
                                    recyclerView.getAdapter().getItemCount() - 1);
                        }
                    }, 100);
                }
            }
        });
    }
mutkan answered 2020-02-14T05:09:28Z
19 votes

这个对我有用

LinearLayoutManager layoutManager = new LinearLayoutManager(context);
layoutManager.setStackFromEnd(true);
recyclerView.setLayoutManager(layoutManager);
anisart answered 2020-02-14T05:09:48Z
7 votes

尽管这是一个老问题,但我今天遇到了这个问题,但发现上述方法均无效。 这是我的解决方案

    recyclerView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View v,
                                   int left, int top, int right, int bottom,
                                   int oldLeft, int oldTop, int oldRight, int oldBottom) {
            if (bottom < oldBottom) {
                final int lastAdapterItem = mAdapter.getItemCount() - 1;
                recyclerView.post(new Runnable() {
                  @Override
                  public void run() {
                    int recyclerViewPositionOffset = -1000000;
                    View bottomView = linearLayoutManager.findViewByPosition(lastAdapterItem);
                    if (bottomView != null) {
                       recyclerViewPositionOffset = 0 - bottomView.getHeight();
                     }
                     linearLayoutManager.scrollToPositionWithOffset(lastAdapterItem, recyclerViewPositionOffset);
                  }
                });
              }
         });
   }
Kutae Shaw answered 2020-02-14T05:10:08Z
6 votes

我发现postDelayed是不必要的,并且当回收站滚动到项目中间的某个位置时,使用适配器位置并不能解决问题。 我达到了想要的外观:

recycler.addOnLayoutChangeListener((view, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom) -> {
    if (bottom < oldBottom) {
        messageRecycler.scrollBy(0, oldBottom - bottom);
    }
})
mp501 answered 2020-02-14T05:12:18Z
3 votes

这可行。

private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private LinearLayoutManager mManager;

...

mManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mManager);

(initialize and set adapter.)

mRecyclerView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
    @Override
    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
        if (bottom < oldBottom) scrollToBottom();
    }
});

private void scrollToBottom() {
    mManager.smoothScrollToPosition(mRecyclerView, null, mAdapter.getItemCount());
}
wonsuc answered 2020-02-14T05:12:38Z
2 votes
        recyclerView.smoothScrollToPosition(recyclerView.getAdapter().getItemCount());
sdelvalle57 answered 2020-02-14T05:12:55Z
1 votes

在支持库版本27.0.1中可以正常工作

清单中没有任何内容。

val currentScrollPosition = 0

recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
        override fun onScrolled(recyclerView: RecyclerView?, dx: Int, dy: Int) {
            super.onScrolled(recyclerView, dx, dy)

            currentScrollPosition = recyclerView.computeVerticalScrollOffset() + recyclerView.computeVerticalScrollExtent()
        }

        override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) { }
    })

    storyList.addOnLayoutChangeListener { view, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
        if (bottom < oldBottom) {
            if (currentScrollPosition >= recyclerView.computeVerticalScrollRange()) {
                recyclerVIew.post {
                    recyclerView.overScrollMode = RecyclerView.OVER_SCROLL_NEVER
                    recyclerView.smoothScrollBy(0, recyclerView.computeVerticalScrollRange() - recyclerView.computeVerticalScrollOffset() + recyclerView.computeVerticalScrollExtent())
                }
            }
        } else {
            recyclerView.overScrollMode = RecyclerView.OVER_SCROLL_ALWAYS
        }
    }
minjung Ahn answered 2020-02-14T05:13:21Z
0 votes

将RecyclerView绑定到NestedScrollView中

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

<android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</android.support.v4.widget.NestedScrollView>
Karthikeyan answered 2020-02-14T05:16:38Z
0 votes

layoutManager.scrollToPositionWithOffset(chatMessageAdapter.getItemCount()-1,0);

Ramesh R answered 2020-02-14T05:16:58Z
translate from https://stackoverflow.com:/questions/34102741/recyclerview-not-scrolling-to-end-when-keyboard-opens