com.geekapp.materialweather.adapter.ViewPagerRunnableAdapter.java Source code

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Here is the source code for com.geekapp.materialweather.adapter.ViewPagerRunnableAdapter.java

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/*
 * Copyright 2015 "Henry Tao <hi@henrytao.me>"
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.geekapp.materialweather.adapter;

import android.support.v4.app.FragmentManager;
import android.support.v4.widget.NestedScrollView;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import me.henrytao.smoothappbarlayout.PagerAdapter;

public class ViewPagerRunnableAdapter extends BaseViewPagerAdapter implements PagerAdapter.OnSyncOffsetRunnable {

    public ViewPagerRunnableAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public void onSyncOffset(int position, final int offset, final Runnable callback) {
        final View scrollView = getScrollView(position);
        if (scrollView instanceof RecyclerView) {
            if (offset == 0) {
                ((RecyclerView) scrollView).scrollToPosition(0);
            } else {
                scrollView.scrollBy(0, offset - ((RecyclerView) scrollView).computeVerticalScrollOffset());
            }
            if (callback != null) {
                callback.run();
            }
        } else if (scrollView instanceof NestedScrollView) {
            scrollView.scrollTo(0, offset);
            if (callback != null) {
                callback.run();
            }
        }
    }
}