小距离上的 RecyclerView smoothScrollToPosition 太快

Question

在我们的聊天应用程序中，我们使用 RecyclerView 可以有不同高度的消息。我想用 smoothScroll 动画消息添加。我的问题是：当我使用recyclerView.smoothScrollToPosition(position)小高度的消息时，它滚动太快。

我也试过这个解决方案改变 smoothScoll speed，它对小消息有好处，但是当消息很大时，它的滚动速度使消息显得太慢。

我的完美速度达到了recyclerView.smoothScrollBy(x, y)，但在这里我在插入消息高度时遇到问题，因为消息可以有任何高度。

Answer 1

计算所有距离的时间的覆盖calculateTimeForScrolling方法：LinearSmoothScroller

public class SpeedyLinearLayoutManager extends LinearLayoutManager {

private int smoothScrollDuration;

public SpeedyLinearLayoutManager(Context context, int smoothScrollDuration) {
    super(context);
    this.smoothScrollDuration = smoothScrollDuration;
}

public SpeedyLinearLayoutManager(Context context, int orientation, boolean reverseLayout, int smoothScrollDuration) {
    super(context, orientation, reverseLayout);
    this.smoothScrollDuration = smoothScrollDuration;
}

public SpeedyLinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes, int smoothScrollDuration) {
    super(context, attrs, defStyleAttr, defStyleRes);
    this.smoothScrollDuration = smoothScrollDuration;
}

@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {

    final LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {

        @Override
        protected int calculateTimeForScrolling(int dx) {
            return smoothScrollDuration;
        }
    };

    linearSmoothScroller.setTargetPosition(position);
    startSmoothScroll(linearSmoothScroller);
}

public int getSmoothScrollDuration() {
    return smoothScrollDuration;
}

public void setSmoothScrollDuration(int smoothScrollDuration) {
    this.smoothScrollDuration = smoothScrollDuration;
}
}

并将其用于回收视图：

    LinearLayoutManager layoutManager = new SpeedyLinearLayoutManager(context, 100);
    mRecyclerView.setLayoutManager(layoutManager);