自定义ViewPager，避免左右滑动时与水平滑动控件冲突

Posted 2020-08-09 guangdeshishe

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

public class CanScrollViewPager extends ViewPager {
  private boolean mNoScroll = false;//标记不允许左右滚动

  /**
   * @param context
   * @param attrs
   */
  public CanScrollViewPager(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  /**
   * @param context
   */
  public CanScrollViewPager(Context context) {
    super(context);
  }


  @Override
  protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
    if (v != this && (v instanceof PageWebView || v instanceof HorizontalGalleryView)) {
      requestDisallowInterceptTouchEvent(true);
      return true;
    }
    return super.canScroll(v, checkV, dx, x, y);
  }

  @Override
  public boolean dispatchTouchEvent(MotionEvent ev) {
    switch (ev.getAction()) {
      case MotionEvent.ACTION_UP:
      case MotionEvent.ACTION_CANCEL:
        break;
      default:
        break;
    }
    return super.dispatchTouchEvent(ev);
  }

  //设置不允许左右滚动
  public void setNoScroll(boolean noScroll) {
    this.mNoScroll = noScroll;
  }

  @Override
  public boolean onTouchEvent(MotionEvent arg0) {
    if (mNoScroll) {
      return false;
    }
    return super.onTouchEvent(arg0);
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent arg0) {
    if (mNoScroll) {
      return false;
    }

    return super.onInterceptTouchEvent(arg0);
  }
}