禁调滑动的recyclerview

最新推荐文章于 2025-02-15 02:42:34 发布

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本文介绍了一个定制版的RecyclerView组件——NoScrollableRecyclerView，该组件通过重写dispatchTouchEvent方法实现了触摸滑动时仅允许垂直滑动的功能，并能有效防止外部父布局拦截其触控事件。



import android.content.Context;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;

public class NoScrollableRecyclerView extends RecyclerView {
    private final int touchSlop;
    private int lastX,lastY;


    public NoScrollableRecyclerView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    }


    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        int x = (int) ev.getRawX();
        int y = (int) ev.getRawY();
        int dealtX = 0;
        int dealtY = 0;
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                getParent().requestDisallowInterceptTouchEvent(true);
                break;
            case MotionEvent.ACTION_MOVE:
                dealtX += Math.abs(x - lastX);
                dealtY += Math.abs(y - lastY);
                if (dealtX >= dealtY) {
                    getParent().requestDisallowInterceptTouchEvent(false);
                } else {
                    getParent().requestDisallowInterceptTouchEvent(true);
                }
                lastX = x;
                lastY = y;
                break;
            case MotionEvent.ACTION_CANCEL:
                break;
            case MotionEvent.ACTION_UP:
                break;
        }
        return super.dispatchTouchEvent(ev);
    }
}