Android 滑动拦截实例代码解析

废话不多说了，直接给大家贴代码了，具体代码如下所示：

 package demo.hq.com.fby;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.LinearLayout;

public class MyParentView extends LinearLayout
{
  
  private int mMove;
  
  private int yDown;
  
  private int yMove;
  
  private int downDistance = 0;
  public MyParentView(Context context, AttributeSet attrs)
  {
    super(context, attrs);
  }
  boolean intercept = false;
  
  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev)
  {
    switch (ev.getAction())
    {
      case MotionEvent.ACTION_DOWN:
 yDown =(int) ev.getY();
 break;
      case MotionEvent.ACTION_MOVE:
 yMove = (int) ev.getY();
 if (yMove > yDown)
 {
   intercept = true;
   Log.d("hqq", "拦截~~~~~~~~~~~~~~~~~~");
 }
 else if (yMove < yDown)
 {
   intercept = false;
   Log.d("hqq", "不拦截~~~~~~~~~~~~~~~~~~");
 }
 break;
      case MotionEvent.ACTION_UP:
 break;
    }
    //true 拦截，进入该控件的onTouchEvent方法 false：进入子控件的onTouchEvent
    boolean returnInterCept = intercept;
    intercept = false;
    return returnInterCept;
  }
  @Override
  public boolean onTouchEvent(MotionEvent event)
  {
    Log.e("hq", "father onTouch");
    int y = (int) event.getY();
    switch (event.getAction())
    {
      case MotionEvent.ACTION_DOWN:
 yDown = y;
 break;
      case MotionEvent.ACTION_MOVE:
 if (downDistance>=250){
 }else {
   yMove = y;
   if (yMove - yDown > 0)
   {
     mMove = yMove - yDown;
     downDistance += mMove;
     if (downDistance>=250){
layout(getLeft(),downDistance, getRight(), getHeight() + downDistance);
     }else {
layout(getLeft(), getTop() + mMove, getRight(), getBottom() + mMove);
     }
   }
 }
 break;
      case MotionEvent.ACTION_UP:
 layout(getLeft(), getTop() - downDistance, getRight(), getBottom() - downDistance);
 downDistance = 0;
 break;
    }
    return true;//    return super.onTouchEvent(event);
  }
}

package demo.hq.com.fby;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class MyScrollView extends ScrollView
{
  public MyScrollView(Context context, AttributeSet attrs)
  {
    super(context, attrs);
  }
  @Override
  public boolean onTouchEvent(MotionEvent ev)
  {
    Log.e("hq","child onTouch----------------");
    switch (ev.getAction()){
      case MotionEvent.ACTION_DOWN:
 getParent().requestDisallowInterceptTouchEvent(true);
 break;
      case MotionEvent.ACTION_MOVE:
 if (getScrollY()==0){//ScrollView没有滑动时 ，即滑动高度没变化的话就允许父控件拦截
   getParent().requestDisallowInterceptTouchEvent(false);
 }else {//禁止拦截
   getParent().requestDisallowInterceptTouchEvent(true);
 }
 break;
    }
    return super.onTouchEvent(ev);
  }
}

以上所述是小编给大家介绍的Android 滑动拦截实例代码解析，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！