Java 与构造函数调用相关的错误。以及参数的传递

我正在尝试在android中为我的recyclerview定制布局管理器。名为CustomLinearLayoutManager。并试图将其构造函数和类调用到我的主片段中。但失败了。还有一些错误

CustomLinearLayoutManager类

public class CustomLinearLayoutManager extends LinearLayoutManager {

    public CustomLinearLayoutManager (Context context) {
        super(context);
    }

    public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    public CustomLinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        final LinearSmoothScroller linearSmoothScroller =
                new LinearSmoothScroller(recyclerView.getContext()) {
                    private static final float MILLISECONDS_PER_INCH = 200f;

                    @Override
                    public PointF computeScrollVectorForPosition(int targetPosition) {
                        return CustomLinearLayoutManager.this
                                .computeScrollVectorForPosition(targetPosition);
                    }

                    @Override
                    protected float calculateSpeedPerPixel
                            (DisplayMetrics displayMetrics) {
                        return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
                    }
                };
        linearSmoothScroller.setTargetPosition(position);
        startSmoothScroll(linearSmoothScroller);
    }
}

家庭碎片

CustomLinearLayoutManager customLinearLayoutManager = new CustomLinearLayoutManager(getContext());
        customLinearLayoutManager.smoothScrollToPosition();
recyclerViewHeaderSlider = view.findViewById(R.id.bannerSlider);
            SnapHelper snapHelper = new PagerSnapHelper();
            snapHelper.attachToRecyclerView(recyclerViewHeaderSlider);
            recyclerViewHeaderSlider.setHasFixedSize(true);
            recyclerViewHeaderSlider.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false));
            headerSliderAdapter.setOnClick(this);
            recyclerViewHeaderSlider.setAdapter(headerSliderAdapter);

我面临的错误

public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }
Error: Constructor 'CustomLinearLayoutManager(android.content.Context, int, boolean)' is never used
public CustomLinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }
 Error: Constructor 'CustomLinearLayoutManager(android.content.Context, android.util.AttributeSet, int, int)' is never used

在主片段中：

customLinearLayoutManager.smoothScrollToPosition();
Error: smoothScrollToPosition() in CustomLinearLayoutManager cannot be 
applied to:
Expected Parameters:     Actual Arguments:
recyclerView:               RecyclerView
state:                         State
position:                       int

---

首先，如果您定义了这些构造函数，但没有使用它们，那么：

错误：从未使用构造函数“CustomLinearLayoutManager（android.content.Context，android.util.AttributeSet，int，int）”

这根本不是一个错误。这是一个

警告

，因为它从未使用过

其次，如果调用方法，请确保正确添加了参数，否则将显示此消息

错误：CustomLinearLayoutManager中的smoothScrollToPosition（）无法应用于：预期参数：实际参数：

然后您应该通过添加以下内容调用此方法

smoothScrollToPosition（RecyclerView RecyclerView，RecyclerView.State State，int-position）

：

第一个参数：对象为回收视图

第二个参数：枚举为RecyclerView.State

第三个参数：作为整数的位置