Android Open Source - EffectiveAndroidUI Chapter View Model Renderer

• Back to UI/pattern  ↑

From Project

Back to project page EffectiveAndroidUI.

License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2014 Pedro Vicente Gmez Snchez.
 */* w  w  w.  j  a v a 2 s  .  c o  m*/
 * 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.github.pedrovgs.effectiveandroidui.ui.renderer.chapterviewmodel;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import butterknife.ButterKnife;
import butterknife.InjectView;
import com.github.pedrovgs.effectiveandroidui.R;
import com.github.pedrovgs.effectiveandroidui.ui.viewmodel.ChapterViewModel;
import com.pedrogomez.renderers.Renderer;
import javax.inject.Inject;

/**
 * Renderer implementation for ChapterViewModel objects.
 *
 * If you want to lear more about how to use Renderers take a look to this project:
 * https://github.com/pedrovgs/Renderers.
 *
 * Review how this renderer register and unregister a view model listener while the recycle process
 * in order to update the UI without use an adapter.notifyDataSetChanged(). This is a nice
 * implementation not really common in Android applications. It has a little bug...can you find it?
 *
 * @author Pedro Vicente Gmez Snchez
 */
public class ChapterViewModelRenderer extends Renderer<ChapterViewModel>
    implements ChapterViewModel.Listener {

  @InjectView(R.id.tv_chapter_number) TextView tv_chapter_number;
  @InjectView(R.id.tv_chapter_title) TextView tv_chapter_title;
  @InjectView(R.id.tv_chapter_publish_date) TextView tv_chapter_publish_date;

  private final Context context;

  @Inject
  public ChapterViewModelRenderer(Context context) {
    this.context = context;
  }

  private int position;

  public void setPosition(int position) {
    this.position = position;
  }

  @Override
  protected void setUpView(View view) {
    ButterKnife.inject(this, view);
  }

  @Override
  protected void hookListeners(View view) {
    //Empty because we are using ButterKnife to inject views.
  }

  @Override
  protected View inflate(LayoutInflater layoutInflater, ViewGroup viewGroup) {
    return layoutInflater.inflate(R.layout.row_chapter, viewGroup, false);
  }

  @Override
  public void render() {
    ChapterViewModel chapter = getContent();
    renderChapterNumber();
    renderChapterTitle(chapter);
    renderChapterPublishDate(chapter);
  }

  @Override public void onRecycle(ChapterViewModel content) {
    getContent().unregisterListener();
    super.onRecycle(content);
    getContent().registerListener(this);
  }

  @Override public void onCreate(ChapterViewModel content, LayoutInflater layoutInflater,
      ViewGroup parent) {
    super.onCreate(content, layoutInflater, parent);
    getContent().registerListener(this);
  }

  private void renderChapterNumber() {
    tv_chapter_number.setText(String.format("%02d", position + 1));
  }

  private void renderChapterTitle(ChapterViewModel chapter) {
    tv_chapter_title.setText(chapter.getTitle());
  }

  private void renderChapterPublishDate(ChapterViewModel chapter) {
    tv_chapter_publish_date.setText(chapter.getPublishDate());
  }

  /**
   * This method is going to be called some seconds after the onCreate onRecycle and will update the
   * view without use a notifyDataSetChanged().
   */
  @Override public void onRateChanged(int rate) {
    ChapterViewModel chapter = getContent();
    String rateMessage = context.getString(R.string.tv_show_rate, rate);
    tv_chapter_title.setText(chapter.getTitle() + " - " + rateMessage);
  }
}

Java Source Code List

• Back to UI/pattern  ↑