io.apptik.multiview.ScrollersFragment.java Source code

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Here is the source code for io.apptik.multiview.ScrollersFragment.java

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/*
 * Copyright (C) 2015 AppTik Project
 *
 * 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 io.apptik.multiview;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.BounceInterpolator;
import android.view.animation.OvershootInterpolator;

import io.apptik.multiview.adapter.BasicMixedRecyclerAdapter;
import io.apptik.multiview.adapter.BasicRecyclerAdapter;
import io.apptik.multiview.mock.MockData;
import io.apptik.multiview.common.Log;
import io.apptik.multiview.scrollers.BaseSmoothScroller;
import io.apptik.multiview.scrollers.FlexiSmoothScroller;

public class ScrollersFragment extends Fragment {

    RecyclerView recyclerView = null;
    BasicRecyclerAdapter recyclerAdapter;
    BasicMixedRecyclerAdapter recyclerMixedAdapter;

    public ScrollersFragment() {
        // Required empty public constructor
    }

    public static ScrollersFragment newInstance() {
        ScrollersFragment fragment = new ScrollersFragment();
        return fragment;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        this.setHasOptionsMenu(true);
        View v = inflater.inflate(R.layout.fragment_recyclerview, container, false);
        recyclerView = (RecyclerView) v.findViewById(R.id.recyclerView);

        recyclerAdapter = new BasicRecyclerAdapter(MockData.getMockJsonArray(333, 500));
        recyclerMixedAdapter = new BasicMixedRecyclerAdapter(MockData.getMockJsonArray(333, 500),
                getActivity().getApplicationContext());

        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerView.setAdapter(recyclerAdapter);
        //recyclerView.setAdapter(recyclerMixedAdapter);
        return v;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        menu.clear();
        inflater.inflate(R.menu.scrollers, menu);

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (recyclerView == null)
            return false;
        switch (item.getItemId()) {
        case R.id.action_text_only:
            recyclerView.setAdapter(recyclerAdapter);
            break;
        case R.id.action_image_only:
            break;
        case R.id.action_Image_text:
            recyclerView.setAdapter(recyclerMixedAdapter);
            break;

        case R.id.action_layout_linear:
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
            break;
        case R.id.action_layout_grid:
            recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 2));
            break;
        case R.id.action_layout_staggered:
            recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
            break;

        case R.id.action_scroll_slow:
            startSmoothScroll(new FlexiSmoothScroller(getContext()).setMillisecondsPerInchSearchingTarget(100f));
            break;
        case R.id.action_scroll_fast:
            startSmoothScroll(new FlexiSmoothScroller(getContext()).setMillisecondsPerInchSearchingTarget(10f));
            break;
        case R.id.action_scroll_snap_center:
            startSmoothScroll(new FlexiSmoothScroller(getContext())
                    .setHorizontalSnapPreference(BaseSmoothScroller.SNAP_TO_CENTER)
                    .setVerticalSnapPreference(BaseSmoothScroller.SNAP_TO_CENTER));
            break;
        case R.id.action_scroll_overshoot:
            startSmoothScroll(new FlexiSmoothScroller(getContext()).setMillisecondsPerInchFoundTarget(300f)
                    .setFoundTargetInterpolator(new OvershootInterpolator()));
            break;
        case R.id.action_scroll_bounce:
            startSmoothScroll(new FlexiSmoothScroller(getContext()).setMillisecondsPerInchFoundTarget(300f)
                    .setFoundTargetInterpolator(new BounceInterpolator()));
            break;

        }
        return true;
    }

    private void startSmoothScroll(RecyclerView.SmoothScroller smoothScroller) {

        int targetPos;
        int pos = recyclerView.getChildAdapterPosition(recyclerView.getLayoutManager().getChildAt(0));
        if (pos >= 150) {
            targetPos = 100;
        } else {
            targetPos = 200;
        }
        Log.d("scrolling from/to: " + pos + "/" + targetPos);
        smoothScroller.setTargetPosition(targetPos);
        recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);
    }
}