Android Open Source - Ocypode Lockable Scroll View

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Back to project page Ocypode.

License

The source code is released under:

MIT License

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Java Source Code

package com.ocypode.component.view.scrollview;
/* www  .  j ava2s  .c o  m*/
import android.content.Context;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class LockableScrollView extends ScrollView implements OnPageChangeListener{
  private boolean isLocked = false;
  private boolean mScrollInit = false;
  private ScrollViewListener scrollViewListener = null;
  
  public LockableScrollView(Context context, AttributeSet attrs) {
    super(context, attrs);

  }

  public void setLock(boolean lock){
    isLocked = lock;
  }
  
  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    if(isLocked){
      return false;
    }else{
      return super.onInterceptTouchEvent(ev);      
    }
  }
  
  @Override
  public void onPageScrollStateChanged(int state) {
    checkStateScroll(state);
  }

  @Override
  public void onPageScrolled(int arg0, float offSet, int arg2) {
    if (offSet > 0 && mScrollInit) {
      setLock(true);
    }
  }

  @Override
  public void onPageSelected(int arg0) {

  }
  
  private void checkStateScroll(int state){
    if(state == 1){
      mScrollInit = true;
    }else if(state == 0){
      mScrollInit = false;
      setLock(false);
    }
  }
  
  public void setScrollViewListener(ScrollViewListener scrollViewListener) {
        this.scrollViewListener = scrollViewListener;
    }
  
  @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (scrollViewListener != null) {
            scrollViewListener.onScrollChanged(this, l, t, oldl, oldt);
        }
    }
  
  public interface ScrollViewListener {
      void onScrollChanged(LockableScrollView scrollView,  int x, int y, int oldx, int oldy);
  }
}

Java Source Code List