122 lines
4.2 KiB
Java
122 lines
4.2 KiB
Java
/*
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* Copyright (C) 2017. Alexander Bilchuk <a.bilchuk@sandrlab.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package code.name.monkey.retromusic.views;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.PagerSnapHelper;
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import android.support.v7.widget.RecyclerView;
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import android.support.v7.widget.SnapHelper;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.view.View;
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import android.view.ViewGroup;
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import code.name.monkey.retromusic.R;
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import code.name.monkey.retromusic.ui.adapter.base.MediaEntryViewHolder;
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public class MetalRecyclerViewPager extends RecyclerView {
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private int itemMargin;
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public MetalRecyclerViewPager(Context context) {
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super(context);
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init(context, null);
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}
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public MetalRecyclerViewPager(Context context, @Nullable AttributeSet attrs) {
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super(context, attrs);
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init(context, attrs);
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}
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public MetalRecyclerViewPager(Context context, @Nullable AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init(context, attrs);
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}
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private void init(Context context, @Nullable AttributeSet attrs) {
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if (attrs != null) {
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TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MetalRecyclerViewPager, 0, 0);
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itemMargin = (int) typedArray.getDimension(R.styleable.MetalRecyclerViewPager_itemMargin, 0f);
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typedArray.recycle();
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}
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setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
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SnapHelper snapHelper = new PagerSnapHelper();
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snapHelper.attachToRecyclerView(this);
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}
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public void setAdapter(Adapter adapter) {
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if (MetalAdapter.class.isInstance(adapter)) {
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MetalAdapter metalAdapter = (MetalAdapter) adapter;
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metalAdapter.setItemMargin(itemMargin);
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metalAdapter.updateDisplayMetrics();
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} else {
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throw new IllegalArgumentException("Only MetalAdapter is allowed here");
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}
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super.setAdapter(adapter);
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}
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public static abstract class MetalAdapter<VH extends MetalViewHolder> extends RecyclerView.Adapter<VH> {
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private DisplayMetrics metrics;
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private int itemMargin;
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private int itemWidth;
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public MetalAdapter(@NonNull DisplayMetrics metrics) {
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this.metrics = metrics;
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}
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void setItemMargin(int itemMargin) {
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this.itemMargin = itemMargin;
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}
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void updateDisplayMetrics() {
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itemWidth = metrics.widthPixels - itemMargin * 2;
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}
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@Override
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public void onBindViewHolder(@NonNull VH holder, int position) {
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int currentItemWidth = itemWidth;
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if (position == 0) {
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currentItemWidth += itemMargin;
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holder.rootLayout.setPadding(0, 0, 0, 0);
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} else if (position == getItemCount() - 1) {
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currentItemWidth += itemMargin;
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holder.rootLayout.setPadding(0, 0, 0, 0);
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}
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int height = holder.rootLayout.getLayoutParams().height;
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holder.rootLayout.setLayoutParams(new ViewGroup.LayoutParams(currentItemWidth, height));
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}
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}
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public static abstract class MetalViewHolder extends MediaEntryViewHolder {
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ViewGroup rootLayout;
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public MetalViewHolder(View itemView) {
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super(itemView);
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rootLayout = (ViewGroup) itemView.findViewById(R.id.root_layout);
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}
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}
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} |