package com.amqtech.opensource.appintroexample.util;
import android.support.test.espresso.IdlingResource;
import android.support.v4.view.ViewPager;
public class ViewPagerIdlingResource implements IdlingResource {
private final String mName;
private boolean mIdle = true; // Default to idle since we can't query the scroll state.
private ResourceCallback mResourceCallback;
public ViewPagerIdlingResource(ViewPager viewPager, String name) {
viewPager.addOnPageChangeListener(new ViewPagerListener());
mName = name;
}
@Override
public String getName() {
return mName;
}
@Override
public boolean isIdleNow() {
return mIdle;
}
@Override
public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
mResourceCallback = resourceCallback;
}
private class ViewPagerListener extends ViewPager.SimpleOnPageChangeListener {
@Override
public void onPageScrollStateChanged(int state) {
mIdle = (state == ViewPager.SCROLL_STATE_IDLE
// Treat dragging as idle, or Espresso will block itself when swiping.
|| state == ViewPager.SCROLL_STATE_DRAGGING);
if (mIdle && mResourceCallback != null) {
mResourceCallback.onTransitionToIdle();
}
}
}
}