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/*
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* Copyright (C) 2012 The Android Open Source Project
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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 com.example.android.displayingbitmaps.ui;
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import android.os.Bundle;
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import android.support.v4.app.Fragment;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.ViewGroup;
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import android.widget.ImageView;
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import com.example.android.displayingbitmaps.R;
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import com.example.android.displayingbitmaps.util.ImageFetcher;
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import com.example.android.displayingbitmaps.util.ImageWorker;
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import com.example.android.displayingbitmaps.util.Utils;
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/**
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* This fragment will populate the children of the ViewPager from {@link ImageDetailActivity}.
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*/
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public class ImageDetailFragment extends Fragment {
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private static final String IMAGE_DATA_EXTRA = "extra_image_data";
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private String mImageUrl;
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private ImageView mImageView;
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private ImageFetcher mImageFetcher;
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/**
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* Factory method to generate a new instance of the fragment given an image number.
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*
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* @param imageUrl The image url to load
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* @return A new instance of ImageDetailFragment with imageNum extras
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*/
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public static ImageDetailFragment newInstance(String imageUrl) {
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final ImageDetailFragment f = new ImageDetailFragment();
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final Bundle args = new Bundle();
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args.putString(IMAGE_DATA_EXTRA, imageUrl);
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f.setArguments(args);
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return f;
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}
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/**
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* Empty constructor as per the Fragment documentation
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*/
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public ImageDetailFragment() {}
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/**
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* Populate image using a url from extras, use the convenience factory method
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* {@link ImageDetailFragment#newInstance(String)} to create this fragment.
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*/
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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mImageUrl = getArguments() != null ? getArguments().getString(IMAGE_DATA_EXTRA) : null;
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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Bundle savedInstanceState) {
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// Inflate and locate the main ImageView
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final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
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mImageView = (ImageView) v.findViewById(R.id.imageView);
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return v;
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}
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@Override
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public void onActivityCreated(Bundle savedInstanceState) {
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super.onActivityCreated(savedInstanceState);
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// Use the parent activity to load the image asynchronously into the ImageView (so a single
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// cache can be used over all pages in the ViewPager
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if (ImageDetailActivity.class.isInstance(getActivity())) {
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mImageFetcher = ((ImageDetailActivity) getActivity()).getImageFetcher();
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mImageFetcher.loadImage(mImageUrl, mImageView);
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}
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// Pass clicks on the ImageView to the parent activity to handle
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if (OnClickListener.class.isInstance(getActivity()) && Utils.hasHoneycomb()) {
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mImageView.setOnClickListener((OnClickListener) getActivity());
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}
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}
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@Override
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public void onDestroy() {
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super.onDestroy();
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if (mImageView != null) {
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// Cancel any pending image work
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ImageWorker.cancelWork(mImageView);
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mImageView.setImageDrawable(null);
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}
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}
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}