NonGreedyNestedScrollView

NonGreedyNestedScrollView.JAVA

package com.example.mrenouf.touchtest;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.widget.NestedScrollView;
import android.util.AttributeSet;
import android.view.MotionEvent;

public class NonGreedyNestedScrollView extends NestedScrollView {

  public NonGreedyNestedScrollView(@NonNull Context context) {
    this(context, null, 0);
  }

  public NonGreedyNestedScrollView(@NonNull Context context, @Nullable AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public NonGreedyNestedScrollView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent event) {
    if (event.getActionMasked() == MotionEvent.ACTION_DOWN
        && !ViewGroups.isTopChildUnder(this, event.getX(), event.getY())) {
      return false;
    }
    return super.onInterceptTouchEvent(event);
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    if (event.getActionMasked() == MotionEvent.ACTION_DOWN
        && !ViewGroups.isTopChildUnder(this, event.getX(), event.getY())) {
      return false;
    }
    return super.onTouchEvent(event);
  }
}