Android 直播聊天界面来消息缓慢向上滑动效果、头部渐变消失

使用自定义

LinearLayoutManager

继承

LinearLayoutManager

覆盖

@Override
    public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        MyLinearSmoothScroller.setTime(300f);
        MyLinearSmoothScroller scroller = new MyLinearSmoothScroller(recyclerView.getContext(), scrollType);
        scroller.setTargetPosition(position);
        startSmoothScroll(scroller);
    }

自定义

LinearSmoothScroller

@Override
    protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
        return 300 / displayMetrics.densityDpi;
    }

使用

recyclerView.smoothScrollToPosition(listData.size - 1)

头部渐变消失效果

自定义recycleview

    @NonNull
    @Override
    public EdgeEffectFactory getEdgeEffectFactory() {
        return new EdgeEffectFactory(){
            @NonNull
            @Override
            protected EdgeEffect createEdgeEffect(@NonNull RecyclerView view, int direction) {
                return new EdgeEffect(content){
                    @Override
                    public boolean draw(Canvas canvas) {
                        return false;
                    }
                };
            }
        };
    }

    //去掉底部渐变消失
    @Override
    protected float getBottomFadingEdgeStrength() {
        return 0;
    }