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David Weiser
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adds rssreader exercise
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‎RssReader/app/build.gradle‎

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apply plugin: 'com.android.application'
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android {
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compileSdkVersion 25
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buildToolsVersion "25.0.3"
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defaultConfig {
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applicationId "com.example.android.rssreader"
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minSdkVersion 25
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targetSdkVersion 25
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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}
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dependencies {
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compile fileTree(include: ['*.jar'], dir: 'libs')
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androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
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exclude group: 'com.android.support', module: 'support-annotations'
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})
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compile "com.android.support:recyclerview-v7:25.3.1"
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testCompile 'junit:junit:4.12'
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compile project(':com.example.android.rssfeedlibrary')
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compile 'com.github.bumptech.glide:glide:3.8.0'
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compile 'com.android.support:support-v4:25.3.1'
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compile 'com.google.code.gson:gson:2.8.1'
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compile 'com.squareup:otto:1.3.8'
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}

‎RssReader/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# By default, the flags in this file are appended to flags specified
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# in /home/david/Android/Sdk/tools/proguard/proguard-android.txt
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# You can edit the include path and order by changing the proguardFiles
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# directive in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# Add any project specific keep options here:
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎RssReader/app/src/androidTest/java/com/example/android/rssreader/ExampleInstrumentedTest.java‎

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

‎RssReader/app/src/main/AndroidManifest.xml‎

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

‎RssReader/app/src/main/java/com/example/android/rssreader/DetailFragment.java‎

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package com.example.android.rssreader;
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import android.app.Fragment;
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import android.os.Bundle;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.webkit.WebView;
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import android.widget.TextView;
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public class DetailFragment extends Fragment {
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public static final String EXTRA_URL ="url";
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private WebView webview;
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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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// no layout file is needed, as we only use one view
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webview = new WebView(getActivity());
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return webview;
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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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Bundle bundle = getArguments();
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if (bundle != null) {
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String link = bundle.getString("url");
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setText(link);
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}
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}
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public void setText(String url) {
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// Set the scale factor
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webview.setInitialScale(50);
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webview.getSettings().setBuiltInZoomControls(true);
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webview.getSettings().setSupportZoom(true);
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webview.loadUrl(url);
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}
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}

‎RssReader/app/src/main/java/com/example/android/rssreader/MyListFragment.java‎

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package com.example.android.rssreader;
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import android.app.Fragment;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.support.v7.widget.GridLayoutManager;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import com.example.android.rssfeedlibrary.RssFeedProvider;
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import com.example.android.rssfeedlibrary.RssItem;
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import com.squareup.otto.Subscribe;
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import java.util.ArrayList;
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import java.util.List;
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public class MyListFragment extends Fragment {
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private OnItemSelectedListener listener;
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RssItemAdapter adapter;
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List<RssItem> rssItems;
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ParseTask parseTask;
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
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View view = inflater.inflate(R.layout.fragment_rsslist_overview, container, false);
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RecyclerView mRecyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
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GridLayoutManager mLayoutManager = new GridLayoutManager(getContext(), 2);
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mRecyclerView.setLayoutManager(mLayoutManager);
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rssItems = RssApplication.list;;
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adapter = new RssItemAdapter(rssItems, this);
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mRecyclerView.setAdapter(adapter);
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if(rssItems.isEmpty()) { // #1
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updateListContent();
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}
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RssApplication.bus.register(this);
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return view;
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}
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public interface OnItemSelectedListener {
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void onRssItemSelected(String link);
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}
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@Override
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public void onAttach(Context context) {
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super.onAttach(context);
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if (context instanceof OnItemSelectedListener) {
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listener = (OnItemSelectedListener) context;
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} else {
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throw new ClassCastException(context.toString()
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+ " must implement MyListFragment.OnItemSelectedListener");
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}
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}
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public void updateDetail(String uri) {
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listener.onRssItemSelected(uri);
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}
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public void updateListContent() {
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if (parseTask == null) {
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parseTask = new ParseTask();
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parseTask.setFragment(this);
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parseTask.execute("http://www.vogella.com/article.rss");
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}
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}
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public void setListContent(List<RssItem> result) {
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RssApplication.list = result;
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rssItems.clear();
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rssItems.addAll(result);
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adapter.notifyDataSetChanged();
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if(parseTask != null) {
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parseTask.setFragment(null);
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parseTask = null;
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}
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}
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private static class ParseTask extends
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AsyncTask<String, Void, List<RssItem>> {
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private MyListFragment fragment;
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public void setFragment(MyListFragment fragment) {
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this.fragment = fragment;
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}
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@Override
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protected List<RssItem> doInBackground(String... params) {
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List<RssItem> list = RssFeedProvider.parse(params[0]);
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return list;
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}
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@Override
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protected void onPostExecute(List<RssItem> result) {
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fragment.setListContent(result);
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}
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}
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@Subscribe
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public void update(Object object){
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getActivity().runOnUiThread(new Runnable() {
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@Override
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public void run() {
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setListContent(new ArrayList<RssItem>(RssApplication.list));
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MyListFragment.this.createNotification();
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}
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});
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}
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private void createNotification() {
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Notification noti = new Notification.Builder(getActivity())
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.setContentTitle("Update").setAutoCancel(true)
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.setSmallIcon(R.mipmap.ic_launcher).
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setContentIntent(PendingIntent.getActivity(getContext(), 0, new Intent
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(getContext(), RssfeedActivity.class),PendingIntent.FLAG_UPDATE_CURRENT))
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.build();
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NotificationManager notificationManager =
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(NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
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notificationManager.notify((int) System.currentTimeMillis(), noti);
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}
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}

‎RssReader/app/src/main/java/com/example/android/rssreader/RssApplication.java‎

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package com.example.android.rssreader;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.lang.reflect.Type;
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import java.util.ArrayList;
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import java.util.List;
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import android.app.Application;
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import com.example.android.rssfeedlibrary.RssItem;
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import com.google.gson.Gson;
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import com.google.gson.reflect.TypeToken;
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import com.squareup.otto.Bus;
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import com.squareup.otto.ThreadEnforcer;
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public class RssApplication extends Application {
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public final static String URL ="url";
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public final static String RSS_UPDATE ="neuedaten";
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public final static String RSS_FILE ="rssitems.json";
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public static List<RssItem> list;
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static Bus bus;
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@Override
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public void onCreate() {
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super.onCreate();
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bus = new Bus(ThreadEnforcer.ANY);
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list = new ArrayList<>();
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StringBuffer buffer = new StringBuffer();
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try (BufferedReader input = new BufferedReader(
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new InputStreamReader(
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openFileInput(RSS_FILE)))) {
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String line;
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while ((line = input.readLine()) != null) {
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buffer.append(line);
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}
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} catch (Exception ex) {
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// do nothing
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}
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if (buffer!=null && buffer.length()>0 )
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{
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Gson gson = new Gson();
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Type type = new TypeToken<List<RssItem>>() {}.getType();
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List<RssItem> fromJson = gson.fromJson(buffer.toString(), type);
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list.addAll(fromJson);
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}
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}
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}

‎RssReader/app/src/main/java/com/example/android/rssreader/RssDownloadService.java‎

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package com.example.android.rssreader;
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import android.app.IntentService;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Bundle;
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import com.example.android.rssfeedlibrary.RssFeedProvider;
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import com.example.android.rssfeedlibrary.RssItem;
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import com.google.gson.Gson;
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import com.google.gson.reflect.TypeToken;
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import java.io.FileOutputStream;
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import java.lang.reflect.Type;
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import java.util.List;
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import static com.example.android.rssreader.RssApplication.RSS_UPDATE;
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public class RssDownloadService extends IntentService {
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public static String NOTIFICATION = "rssfeedupdated";
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public RssDownloadService() {
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super("RssDownloadService");
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}
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@Override
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protected void onHandleIntent(Intent intent) {
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Bundle extras = intent.getExtras();
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String string = extras.getString("url");
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List<RssItem> list = RssFeedProvider.parse(string);
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RssApplication.list = list;
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RssApplication.bus.post(RSS_UPDATE);
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}
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}

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