MP1_CalebFontenot

Book Files/27_Search/LICENSE.txt

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+
+                                 Apache License
+                           Version 2.0, January 2004
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+
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Book Files/27_Search/PhotoGallery/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild

Book Files/27_Search/PhotoGallery/.idea/compiler.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <resourceExtensions />
+    <wildcardResourcePatterns>
+      <entry name="!?*.java" />
+      <entry name="!?*.form" />
+      <entry name="!?*.class" />
+      <entry name="!?*.groovy" />
+      <entry name="!?*.scala" />
+      <entry name="!?*.flex" />
+      <entry name="!?*.kt" />
+      <entry name="!?*.clj" />
+      <entry name="!?*.aj" />
+    </wildcardResourcePatterns>
+    <annotationProcessing>
+      <profile default="true" name="Default" enabled="false">
+        <processorPath useClasspath="true" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

Book Files/27_Search/PhotoGallery/.idea/copyright/profiles_settings.xml

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+<component name="CopyrightManager">
+  <settings default="" />
+</component>

Book Files/27_Search/PhotoGallery/.idea/gradle.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

Book Files/27_Search/PhotoGallery/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
+    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+        </list>
+      </value>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

Book Files/27_Search/PhotoGallery/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/PhotoGallery.iml" filepath="$PROJECT_DIR$/PhotoGallery.iml" />
+      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+    </modules>
+  </component>
+</project>

Book Files/27_Search/PhotoGallery/.idea/runConfigurations.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

Book Files/27_Search/PhotoGallery/app/.gitignore

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+/build

Book Files/27_Search/PhotoGallery/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion '25.0.2'
+    defaultConfig {
+        applicationId "com.bignerdranch.android.photogallery"
+        minSdkVersion 19
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.0'
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:recyclerview-v7:25.3.0'
+}

Book Files/27_Search/PhotoGallery/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/bphillips/devtools/android-sdk-macosx/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

Book Files/27_Search/PhotoGallery/app/src/androidTest/java/com/bignerdranch/android/photogallery/ExampleInstrumentedTest.java

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+package com.bignerdranch.android.photogallery;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.bignerdranch.android.photogallery", appContext.getPackageName());
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.bignerdranch.android.photogallery">
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".PhotoGalleryActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/FlickrFetchr.java

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+package com.bignerdranch.android.photogallery;
+
+import android.net.Uri;
+import android.util.Log;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FlickrFetchr {
+    private static final String TAG = "FlickrFetchr";
+
+    private static final String API_KEY = "REPLACE_ME_WITH_A_REAL_KEY";
+    private static final String FETCH_RECENTS_METHOD = "flickr.photos.getRecent";
+    private static final String SEARCH_METHOD = "flickr.photos.search";
+    private static final Uri ENDPOINT = Uri
+            .parse("https://api.flickr.com/services/rest/")
+            .buildUpon()
+            .appendQueryParameter("api_key", API_KEY)
+            .appendQueryParameter("format", "json")
+            .appendQueryParameter("nojsoncallback", "1")
+            .appendQueryParameter("extras", "url_s")
+            .build();
+
+    public byte[] getUrlBytes(String urlSpec) throws IOException {
+        URL url = new URL(urlSpec);
+        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
+        try {
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            InputStream in = connection.getInputStream();
+            if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
+                throw new IOException(connection.getResponseMessage() +
+                        ": with " +
+                        urlSpec);
+            }
+            int bytesRead = 0;
+            byte[] buffer = new byte[1024];
+            while ((bytesRead = in.read(buffer)) > 0) {
+                out.write(buffer, 0, bytesRead);
+            }
+            out.close();
+            return out.toByteArray();
+        } finally {
+            connection.disconnect();
+        }
+    }
+
+    public String getUrlString(String urlSpec) throws IOException {
+        return new String(getUrlBytes(urlSpec));
+    }
+
+    public List<GalleryItem> fetchRecentPhotos() {
+        String url = buildUrl(FETCH_RECENTS_METHOD, null);
+        return downloadGalleryItems(url);
+    }
+
+    public List<GalleryItem> searchPhotos(String query) {
+        String url = buildUrl(SEARCH_METHOD, query);
+        return downloadGalleryItems(url);
+    }
+
+    private List<GalleryItem> downloadGalleryItems(String url) {
+        List<GalleryItem> items = new ArrayList<>();
+
+        try {
+            String jsonString = getUrlString(url);
+            Log.i(TAG, "Received JSON: " + jsonString);
+            JSONObject jsonBody = new JSONObject(jsonString);
+            parseItems(items, jsonBody);
+        } catch (IOException ioe) {
+            Log.e(TAG, "Failed to fetch items", ioe);
+        } catch (JSONException je) {
+            Log.e(TAG, "Failed to parse JSON", je);
+        }
+
+        return items;
+    }
+
+    private String buildUrl(String method, String query) {
+        Uri.Builder uriBuilder = ENDPOINT.buildUpon()
+                .appendQueryParameter("method", method);
+
+        if (method.equals(SEARCH_METHOD)) {
+            uriBuilder.appendQueryParameter("text", query);
+        }
+
+        return uriBuilder.build().toString();
+    }
+
+    private void parseItems(List<GalleryItem> items, JSONObject jsonBody)
+            throws IOException, JSONException {
+
+        JSONObject photosJsonObject = jsonBody.getJSONObject("photos");
+        JSONArray photoJsonArray = photosJsonObject.getJSONArray("photo");
+
+        for (int i = 0; i < photoJsonArray.length(); i++) {
+            JSONObject photoJsonObject = photoJsonArray.getJSONObject(i);
+
+            GalleryItem item = new GalleryItem();
+            item.setId(photoJsonObject.getString("id"));
+            item.setCaption(photoJsonObject.getString("title"));
+
+            if (!photoJsonObject.has("url_s")) {
+                continue;
+            }
+
+            item.setUrl(photoJsonObject.getString("url_s"));
+            items.add(item);
+        }
+    }
+
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/GalleryItem.java

@@ -0,0 +1,36 @@
+package com.bignerdranch.android.photogallery;
+
+public class GalleryItem {
+    private String mCaption;
+    private String mId;
+    private String mUrl;
+
+    public String getCaption() {
+        return mCaption;
+    }
+
+    public void setCaption(String caption) {
+        mCaption = caption;
+    }
+
+    public String getId() {
+        return mId;
+    }
+
+    public void setId(String id) {
+        mId = id;
+    }
+
+    public String getUrl() {
+        return mUrl;
+    }
+
+    public void setUrl(String url) {
+        mUrl = url;
+    }
+
+    @Override
+    public String toString() {
+        return mCaption;
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/PhotoGalleryActivity.java

@@ -0,0 +1,11 @@
+package com.bignerdranch.android.photogallery;
+
+import android.support.v4.app.Fragment;
+
+public class PhotoGalleryActivity extends SingleFragmentActivity {
+
+    @Override
+    protected Fragment createFragment() {
+        return PhotoGalleryFragment.newInstance();
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/PhotoGalleryFragment.java

@@ -0,0 +1,209 @@
+package com.bignerdranch.android.photogallery;
+
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.v4.app.Fragment;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.SearchView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PhotoGalleryFragment extends Fragment {
+    private static final String TAG = "PhotoGalleryFragment";
+
+    private RecyclerView mPhotoRecyclerView;
+    private List<GalleryItem> mItems = new ArrayList<>();
+    private ThumbnailDownloader<PhotoHolder> mThumbnailDownloader;
+
+    public static PhotoGalleryFragment newInstance() {
+        return new PhotoGalleryFragment();
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setRetainInstance(true);
+        setHasOptionsMenu(true);
+        updateItems();
+
+        Handler responseHandler = new Handler();
+        mThumbnailDownloader = new ThumbnailDownloader<>(responseHandler);
+        mThumbnailDownloader.setThumbnailDownloadListener(
+            new ThumbnailDownloader.ThumbnailDownloadListener<PhotoHolder>() {
+                @Override
+                public void onThumbnailDownloaded(PhotoHolder photoHolder, Bitmap bitmap) {
+                    Drawable drawable = new BitmapDrawable(getResources(), bitmap);
+                    photoHolder.bindDrawable(drawable);
+                }
+            }
+        );
+        mThumbnailDownloader.start();
+        mThumbnailDownloader.getLooper();
+        Log.i(TAG, "Background thread started");
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View v = inflater.inflate(R.layout.fragment_photo_gallery, container, false);
+
+        mPhotoRecyclerView = (RecyclerView) v.findViewById(R.id.photo_recycler_view);
+        mPhotoRecyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 3));
+
+        setupAdapter();
+
+        return v;
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        mThumbnailDownloader.clearQueue();
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mThumbnailDownloader.quit();
+        Log.i(TAG, "Background thread destroyed");
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater menuInflater) {
+        super.onCreateOptionsMenu(menu, menuInflater);
+        menuInflater.inflate(R.menu.fragment_photo_gallery, menu);
+        MenuItem searchItem = menu.findItem(R.id.menu_item_search);
+        final SearchView searchView = (SearchView) searchItem.getActionView();
+
+            searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+                @Override
+                public boolean onQueryTextSubmit(String s) {
+                    Log.d(TAG, "QueryTextSubmit: " + s);
+                    QueryPreferences.setStoredQuery(getActivity(), s);
+                    updateItems();
+                    return true;
+                }
+
+                @Override
+                public boolean onQueryTextChange(String s) {
+                    Log.d(TAG, "QueryTextChange: " + s);
+                    return false;
+                }
+            });
+
+        searchView.setOnSearchClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                String query = QueryPreferences.getStoredQuery(getActivity());
+                searchView.setQuery(query, false);
+            }
+        });
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.menu_item_clear:
+                QueryPreferences.setStoredQuery(getActivity(), null);
+                updateItems();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void updateItems() {
+        String query = QueryPreferences.getStoredQuery(getActivity());
+        new FetchItemsTask(query).execute();
+    }
+
+    private void setupAdapter() {
+        if (isAdded()) {
+            mPhotoRecyclerView.setAdapter(new PhotoAdapter(mItems));
+        }
+    }
+
+    private class PhotoHolder extends RecyclerView.ViewHolder {
+        private ImageView mItemImageView;
+
+        public PhotoHolder(View itemView) {
+            super(itemView);
+
+            mItemImageView = (ImageView) itemView.findViewById(R.id.item_image_view);
+        }
+
+        public void bindDrawable(Drawable drawable) {
+            mItemImageView.setImageDrawable(drawable);
+        }
+    }
+
+    private class PhotoAdapter extends RecyclerView.Adapter<PhotoHolder> {
+
+        private List<GalleryItem> mGalleryItems;
+
+        public PhotoAdapter(List<GalleryItem> galleryItems) {
+            mGalleryItems = galleryItems;
+        }
+
+        @Override
+        public PhotoHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
+            LayoutInflater inflater = LayoutInflater.from(getActivity());
+            View view = inflater.inflate(R.layout.list_item_gallery, viewGroup, false);
+            return new PhotoHolder(view);
+        }
+
+        @Override
+        public void onBindViewHolder(PhotoHolder photoHolder, int position) {
+            GalleryItem galleryItem = mGalleryItems.get(position);
+            Drawable placeholder = getResources().getDrawable(R.drawable.bill_up_close);
+            photoHolder.bindDrawable(placeholder);
+            mThumbnailDownloader.queueThumbnail(photoHolder, galleryItem.getUrl());
+        }
+
+        @Override
+        public int getItemCount() {
+            return mGalleryItems.size();
+        }
+    }
+
+    private class FetchItemsTask extends AsyncTask<Void,Void,List<GalleryItem>> {
+
+        private String mQuery;
+
+        public FetchItemsTask(String query) {
+            mQuery = query;
+        }
+
+        @Override
+        protected List<GalleryItem> doInBackground(Void... params) {
+
+            if (mQuery == null) {
+                return new FlickrFetchr().fetchRecentPhotos();
+            } else {
+                return new FlickrFetchr().searchPhotos(mQuery);
+            }
+        }
+
+        @Override
+        protected void onPostExecute(List<GalleryItem> items) {
+            mItems = items;
+            setupAdapter();
+        }
+
+    }
+
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/QueryPreferences.java

@@ -0,0 +1,21 @@
+package com.bignerdranch.android.photogallery;
+
+import android.content.Context;
+import android.preference.PreferenceManager;
+
+public class QueryPreferences {
+
+    private static final String PREF_SEARCH_QUERY = "searchQuery";
+
+    public static String getStoredQuery(Context context) {
+        return PreferenceManager.getDefaultSharedPreferences(context)
+                .getString(PREF_SEARCH_QUERY, null);
+    }
+
+    public static void setStoredQuery(Context context, String query) {
+        PreferenceManager.getDefaultSharedPreferences(context)
+                .edit()
+                .putString(PREF_SEARCH_QUERY, query)
+                .apply();
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/SingleFragmentActivity.java

@@ -0,0 +1,33 @@
+package com.bignerdranch.android.photogallery;
+
+import android.os.Bundle;
+import android.support.annotation.LayoutRes;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v7.app.AppCompatActivity;
+
+public abstract class SingleFragmentActivity extends AppCompatActivity {
+
+    protected abstract Fragment createFragment();
+
+    @LayoutRes
+    protected int getLayoutResId() {
+        return R.layout.activity_fragment;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(getLayoutResId());
+
+        FragmentManager fm = getSupportFragmentManager();
+        Fragment fragment = fm.findFragmentById(R.id.fragment_container);
+
+        if (fragment == null) {
+            fragment = createFragment();
+            fm.beginTransaction()
+                    .add(R.id.fragment_container, fragment)
+                    .commit();
+        }
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/java/com/bignerdranch/android/photogallery/ThumbnailDownloader.java

@@ -0,0 +1,102 @@
+package com.bignerdranch.android.photogallery;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Message;
+import android.util.Log;
+
+import java.io.IOException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+public class ThumbnailDownloader<T> extends HandlerThread {
+    private static final String TAG = "ThumbnailDownloader";
+    private static final int MESSAGE_DOWNLOAD = 0;
+
+    private boolean mHasQuit = false;
+    private Handler mRequestHandler;
+    private ConcurrentMap<T,String> mRequestMap = new ConcurrentHashMap<>();
+    private Handler mResponseHandler;
+    private ThumbnailDownloadListener<T> mThumbnailDownloadListener;
+
+    public interface ThumbnailDownloadListener<T> {
+        void onThumbnailDownloaded(T target, Bitmap bitmap);
+    }
+
+    public void setThumbnailDownloadListener(ThumbnailDownloadListener<T> listener) {
+        mThumbnailDownloadListener = listener;
+    }
+
+    public ThumbnailDownloader(Handler responseHandler) {
+        super(TAG);
+        mResponseHandler = responseHandler;
+    }
+
+    @Override
+    protected void onLooperPrepared() {
+        mRequestHandler = new Handler() {
+            @Override
+            public void handleMessage(Message msg) {
+                if (msg.what == MESSAGE_DOWNLOAD) {
+                    T target = (T) msg.obj;
+                    Log.i(TAG, "Got a request for URL: " + mRequestMap.get(target));
+                    handleRequest(target);
+                }
+            }
+        };
+    }
+
+    @Override
+    public boolean quit() {
+        mHasQuit = true;
+        return super.quit();
+    }
+
+    public void queueThumbnail(T target, String url) {
+        Log.i(TAG, "Got a URL: " + url);
+
+        if (url == null) {
+            mRequestMap.remove(target);
+        } else {
+            mRequestMap.put(target, url);
+            mRequestHandler.obtainMessage(MESSAGE_DOWNLOAD, target)
+                    .sendToTarget();
+        }
+    }
+
+    public void clearQueue() {
+        mRequestHandler.removeMessages(MESSAGE_DOWNLOAD);
+        mRequestMap.clear();
+    }
+
+    private void handleRequest(final T target) {
+        try {
+            final String url = mRequestMap.get(target);
+
+            if (url == null) {
+                return;
+            }
+
+            byte[] bitmapBytes = new FlickrFetchr().getUrlBytes(url);
+            final Bitmap bitmap = BitmapFactory
+                    .decodeByteArray(bitmapBytes, 0, bitmapBytes.length);
+            Log.i(TAG, "Bitmap created");
+
+            mResponseHandler.post(new Runnable() {
+                public void run() {
+                    if (mRequestMap.get(target) != url ||
+                            mHasQuit) {
+                        return;
+                    }
+
+                    mRequestMap.remove(target);
+                    mThumbnailDownloadListener.onThumbnailDownloaded(target, bitmap);
+                }
+            });
+        } catch (IOException ioe) {
+            Log.e(TAG, "Error downloading image", ioe);
+        }
+    }
+}

Book Files/27_Search/PhotoGallery/app/src/main/res/layout/activity_fragment.xml

@@ -0,0 +1,4 @@
+<FrameLayout android:id="@+id/fragment_container"
+             xmlns:android="http://schemas.android.com/apk/res/android"
+             android:layout_width="match_parent"
+             android:layout_height="match_parent" />

Book Files/27_Search/PhotoGallery/app/src/main/res/layout/fragment_photo_gallery.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.widget.RecyclerView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/photo_recycler_view"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.bignerdranch.android.photogallery.PhotoGalleryActivity"/>

Book Files/27_Search/PhotoGallery/app/src/main/res/layout/list_item_gallery.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
+           android:id="@+id/item_image_view"
+           android:layout_width="match_parent"
+           android:layout_height="120dp"
+           android:layout_gravity="center"
+           android:scaleType="centerCrop" />

Book Files/27_Search/PhotoGallery/app/src/main/res/menu/fragment_photo_gallery.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item android:id="@+id/menu_item_search"
+          android:title="@string/search"
+          app:actionViewClass="android.support.v7.widget.SearchView"
+          app:showAsAction="ifRoom" />
+
+    <item android:id="@+id/menu_item_clear"
+          android:title="@string/clear_search"
+          app:showAsAction="never" />
+</menu>

Book Files/27_Search/PhotoGallery/app/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

Book Files/27_Search/PhotoGallery/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

Book Files/27_Search/PhotoGallery/app/src/main/res/values/dimens.xml

@@ -0,0 +1,5 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

Book Files/27_Search/PhotoGallery/app/src/main/res/values/strings.xml

@@ -0,0 +1,5 @@
+<resources>
+    <string name="app_name">PhotoGallery</string>
+    <string name="search">Search</string>
+    <string name="clear_search">Clear Search</string>
+</resources>

Book Files/27_Search/PhotoGallery/app/src/main/res/values/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

Book Files/27_Search/PhotoGallery/app/src/test/java/com/bignerdranch/android/photogallery/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.bignerdranch.android.photogallery;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}

Book Files/27_Search/PhotoGallery/build.gradle

@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.3.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

Book Files/27_Search/PhotoGallery/gradle.properties

@@ -0,0 +1,17 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx1536m
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

Book Files/27_Search/PhotoGallery/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Dec 28 10:00:20 PST 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https://services.gradle.org/distributions/gradle-3.3-all.zip

Book Files/27_Search/PhotoGallery/gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

Book Files/27_Search/PhotoGallery/gradlew.bat

@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

Book Files/27_Search/PhotoGallery/settings.gradle

@@ -0,0 +1 @@
+include ':app'