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BookImageActivity.java
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BookImageActivity.java
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/*
* Copyright 2017 Kaushik N. Sanji
*
* 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.example.kaushiknsanji.bookslibrary;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.NavUtils;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.MenuItem;
import android.widget.ImageView;
import com.example.kaushiknsanji.bookslibrary.workers.ImageDownloaderFragment;
/**
* Activity class that displays the Image of the {@link com.example.kaushiknsanji.bookslibrary.models.BookInfo}
* Book item being viewed in the {@link BookDetailActivity}
*
* @author Kaushik N Sanji
*/
public class BookImageActivity extends AppCompatActivity {
//Bundle Key used for grabbing the Intent's data
public static final String BOOK_INFO_ITEM_IMAGE_STR_KEY = "BookInfo.Item.Image.Data";
//Constant used for Logs
private static final String LOG_TAG = BookImageActivity.class.getSimpleName();
//Method invoked by the system to create and setup the layout 'R.layout.activity_book_image'
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_book_image);
//Displaying the Up button
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
//Finding the ImageView
ImageView bookImageView = findViewById(R.id.book_image_id);
//Loading the Image to be shown from the Intent received
Intent bookImageIntent = getIntent();
String imageLinkForBookImageInfo = bookImageIntent.getStringExtra(BOOK_INFO_ITEM_IMAGE_STR_KEY);
if (!TextUtils.isEmpty(imageLinkForBookImageInfo)) {
//Loading the Image when link is present
ImageDownloaderFragment
.newInstance(getSupportFragmentManager(), bookImageView.getId())
.executeAndUpdate(bookImageView,
imageLinkForBookImageInfo,
bookImageView.getId());
} else {
//Resetting to the default Book image when link is absent
//(This case can only occur if there is a problem with network connectivity)
bookImageView.setImageResource(R.drawable.ic_book);
}
}
/**
* This hook is called whenever an item in your options menu is selected.
*
* @param item The menu item that was selected.
* @return boolean Return false to allow normal menu processing to
* proceed, true to consume it here.
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//Executing based on MenuItem's Id
switch (item.getItemId()) {
case android.R.id.home:
//Handling the action bar's home/up button
NavUtils.navigateUpFromSameTask(this);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}