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[sample] Factor out adapter into separate LayoutAdapter class
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sample/src/main/java/org/lucasr/twowayview/sample/LayoutAdapter.java
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| /* | ||
| * Copyright (C) 2014 Lucas Rocha | ||
| * | ||
| * 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. | ||
| */ | ||
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| package org.lucasr.twowayview.sample; | ||
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| import android.content.Context; | ||
| import android.support.v7.widget.RecyclerView; | ||
| import android.view.LayoutInflater; | ||
| import android.view.View; | ||
| import android.view.ViewGroup; | ||
| import android.widget.TextView; | ||
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| import org.lucasr.twowayview.TwoWayLayoutManager; | ||
| import org.lucasr.twowayview.TwoWayView; | ||
| import org.lucasr.twowayview.widget.SpannableGridLayoutManager; | ||
| import org.lucasr.twowayview.widget.StaggeredGridLayoutManager; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
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| public class LayoutAdapter extends RecyclerView.Adapter<LayoutAdapter.SimpleViewHolder> { | ||
| private static final int COUNT = 100; | ||
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| private final Context mContext; | ||
| private final TwoWayView mRecyclerView; | ||
| private final List<Integer> mItems; | ||
| private final int mLayoutId; | ||
| private int mCurrentItemId = 0; | ||
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| public static class SimpleViewHolder extends RecyclerView.ViewHolder { | ||
| public final TextView title; | ||
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| public SimpleViewHolder(View view) { | ||
| super(view); | ||
| title = (TextView) view.findViewById(R.id.title); | ||
| } | ||
| } | ||
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| public LayoutAdapter(Context context, TwoWayView recyclerView, int layoutId) { | ||
| mContext = context; | ||
| mItems = new ArrayList<Integer>(COUNT); | ||
| for (int i = 0; i < COUNT; i++) { | ||
| addItem(i); | ||
| } | ||
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| mRecyclerView = recyclerView; | ||
| mLayoutId = layoutId; | ||
| } | ||
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| public void addItem(int position) { | ||
| final int id = ++mCurrentItemId; | ||
| mItems.add(position, id); | ||
| notifyItemInserted(position); | ||
| } | ||
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| public void removeItem(int position) { | ||
| mItems.remove(position); | ||
| notifyItemRemoved(position); | ||
| } | ||
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| @Override | ||
| public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { | ||
| final View view = LayoutInflater.from(mContext).inflate(R.layout.item, parent, false); | ||
| return new SimpleViewHolder(view); | ||
| } | ||
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| @Override | ||
| public void onBindViewHolder(SimpleViewHolder holder, int position) { | ||
| holder.title.setText(mItems.get(position).toString()); | ||
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| boolean isVertical = (mRecyclerView.getOrientation() == TwoWayLayoutManager.Orientation.VERTICAL); | ||
| final View itemView = holder.itemView; | ||
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| if (mLayoutId == R.layout.layout_staggered_grid) { | ||
| final int id; | ||
| if (position % 3 == 0) { | ||
| id = R.dimen.staggered_child_medium; | ||
| } else if (position % 5 == 0) { | ||
| id = R.dimen.staggered_child_large; | ||
| } else if (position % 7 == 0) { | ||
| id = R.dimen.staggered_child_xlarge; | ||
| } else { | ||
| id = R.dimen.staggered_child_small; | ||
| } | ||
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| final int span; | ||
| if (position == 2) { | ||
| span = 2; | ||
| } else { | ||
| span = 1; | ||
| } | ||
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| final int size = mContext.getResources().getDimensionPixelSize(id); | ||
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| final StaggeredGridLayoutManager.LayoutParams lp = | ||
| (StaggeredGridLayoutManager.LayoutParams) itemView.getLayoutParams(); | ||
| if (!isVertical && lp.width != id) { | ||
| lp.span = span; | ||
| lp.width = size; | ||
| itemView.setLayoutParams(lp); | ||
| } else if (isVertical && lp.height != id) { | ||
| lp.span = span; | ||
| lp.height = size; | ||
| itemView.setLayoutParams(lp); | ||
| } | ||
| } else if (mLayoutId == R.layout.layout_spannable_grid) { | ||
| final SpannableGridLayoutManager.LayoutParams lp = | ||
| (SpannableGridLayoutManager.LayoutParams) itemView.getLayoutParams(); | ||
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| final int span1 = (position == 0 || position == 3 ? 2 : 1); | ||
| final int span2 = (position == 0 ? 2 : (position == 3 ? 3 : 1)); | ||
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| final int colSpan = (isVertical ? span2 : span1); | ||
| final int rowSpan = (isVertical ? span1 : span2); | ||
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| if (lp.rowSpan != rowSpan || lp.colSpan != colSpan) { | ||
| lp.rowSpan = rowSpan; | ||
| lp.colSpan = colSpan; | ||
| itemView.setLayoutParams(lp); | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public int getItemCount() { | ||
| return mItems.size(); | ||
| } | ||
| } |
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