Java tutorial
/* * Copyright (C) 2016 The Nerdery, LLC * * 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.nerderylabs.android.nerdalert.ui.adapter; import com.nerderylabs.android.nerdalert.R; import com.nerderylabs.android.nerdalert.model.Neighbor; import com.nerderylabs.android.nerdalert.model.Tabs; import android.content.Context; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.support.v4.content.ContextCompat; import android.support.v4.graphics.drawable.DrawableCompat; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import java.util.List; public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> { private static final String TAG = RecyclerViewAdapter.class.getSimpleName(); private final Context context; private final List<Neighbor> neighbors; private final Tabs tab; public RecyclerViewAdapter(Context context, List<Neighbor> neighbors, Tabs tab) { this.context = context; this.neighbors = neighbors; this.tab = tab; } @Override public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_neighbor, parent, false); return new ViewHolder(v); } @Override public void onBindViewHolder(RecyclerViewAdapter.ViewHolder holder, int position) { Neighbor neighbor = neighbors.get(position); if (neighbor.getName() != null) { holder.name.setText(neighbor.getName()); } if (neighbor.getTagline() != null) { holder.tagline.setText(neighbor.getTagline()); } if (neighbor.getBitmap() != null) { holder.photo.setImageDrawable(new BitmapDrawable(context.getResources(), neighbor.getBitmap())); } else { Drawable photo = ContextCompat.getDrawable(context, tab.getEmptyPhotoDrawableId()); DrawableCompat.setTint(photo, ContextCompat.getColor(context, R.color.color_nametag)); holder.photo.setImageDrawable(photo); } } @Override public int getItemCount() { return neighbors == null ? 0 : neighbors.size(); } public static class ViewHolder extends RecyclerView.ViewHolder { public final TextView name; public final TextView tagline; public final ImageView photo; public ViewHolder(View itemView) { super(itemView); name = (TextView) itemView.findViewById(R.id.neighbor_name); tagline = (TextView) itemView.findViewById(R.id.neighbor_tagline); photo = (ImageView) itemView.findViewById(R.id.neighbor_photo); } } }