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David Weiser
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adds github issue tracker exercise
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‎com.vogella.android.github.issuetracker/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 "25.0.2"
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defaultConfig {
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applicationId "com.vogella.android.github.issuetracker"
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minSdkVersion 15
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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(dir: 'libs', include: ['*.jar'])
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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:appcompat-v7:25.3.1'
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compile 'com.squareup.retrofit2:retrofit:2.2.0'
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compile 'com.squareup.retrofit2:adapter-rxjava2:2.2.0'
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compile 'com.squareup.retrofit2:converter-gson:2.2.0'
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compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
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compile 'com.squareup.okhttp3:logging-interceptor:3.7.0'
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testCompile 'junit:junit:4.12'
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}

‎com.vogella.android.github.issuetracker/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

‎com.vogella.android.github.issuetracker/app/src/androidTest/java/com/vogella/android/github/issuetracker/ExampleInstrumentedTest.java‎

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package com.vogella.android.github.issuetracker;
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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.vogella.android.github.issuetracker", appContext.getPackageName());
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}
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}

‎com.vogella.android.github.issuetracker/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.vogella.android.github.issuetracker">
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<uses-permission android:name="android.permission.INTERNET" />
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<application
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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:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/AppTheme">
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<activity android:name=".MainActivity">
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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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</application>
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</manifest>

‎com.vogella.android.github.issuetracker/app/src/main/java/com/vogella/android/github/issuetracker/CommunicationController.java‎

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package com.vogella.android.github.issuetracker;
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import java.util.List;
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import io.reactivex.android.schedulers.AndroidSchedulers;
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import io.reactivex.observers.DisposableSingleObserver;
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import io.reactivex.schedulers.Schedulers;
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import okhttp3.Credentials;
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import okhttp3.OkHttpClient;
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import okhttp3.logging.HttpLoggingInterceptor;
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import retrofit2.Retrofit;
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import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
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import retrofit2.converter.gson.GsonConverterFactory;
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public class CommunicationController {
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private GithubApi githubApi;
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public CommunicationController() {
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initGithubApi();
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}
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private void initGithubApi() {
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HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
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interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
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OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor(interceptor).build();
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Retrofit retrofit = new Retrofit.Builder()
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.client(okHttpClient)
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.baseUrl(GithubApi.BASE_URL)
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.addConverterFactory(GsonConverterFactory.create())
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.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
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.build();
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githubApi = retrofit.create(GithubApi.class);
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}
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public void loadIssues(String username, String password, DisposableSingleObserver<List<Issue>> observer, String owner, String repository) {
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githubApi.getIssues(Credentials.basic(username, password), owner, repository)
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(observer);
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}
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}

‎com.vogella.android.github.issuetracker/app/src/main/java/com/vogella/android/github/issuetracker/CredentialsDialog.java‎

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package com.vogella.android.github.issuetracker;
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import android.app.Dialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.os.Bundle;
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import android.support.annotation.NonNull;
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import android.support.v4.app.DialogFragment;
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import android.support.v7.app.AlertDialog;
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import android.view.View;
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import android.widget.EditText;
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public class CredentialsDialog extends DialogFragment {
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EditText usernameEditText;
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EditText passwordEditText;
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ICredentialsDialogListener listener;
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public interface ICredentialsDialogListener {
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void onDialogPositiveClick(String username, String password);
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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 (getActivity() instanceof ICredentialsDialogListener) {
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listener = (ICredentialsDialogListener) getActivity();
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}
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}
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@NonNull
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@Override
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public Dialog onCreateDialog(Bundle savedInstanceState) {
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View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_credentials, null);
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usernameEditText = (EditText) view.findViewById(R.id.username_edittext);
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passwordEditText = (EditText) view.findViewById(R.id.password_edittext);
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usernameEditText.setText(getArguments().getString("username"));
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passwordEditText.setText(getArguments().getString("password"));
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AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
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.setView(view)
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.setTitle("Credentials")
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.setNegativeButton("Cancel", null)
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.setPositiveButton("Store", new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int which) {
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if (listener != null) {
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listener.onDialogPositiveClick(usernameEditText.getText().toString(), passwordEditText.getText().toString());
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}
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}
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});
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return builder.create();
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}
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}

‎com.vogella.android.github.issuetracker/app/src/main/java/com/vogella/android/github/issuetracker/GithubApi.java‎

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package com.vogella.android.github.issuetracker;
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import java.util.List;
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import io.reactivex.Single;
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import retrofit2.http.GET;
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import retrofit2.http.Header;
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import retrofit2.http.Path;
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public interface GithubApi {
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String BASE_URL = "https://api.github.com";
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@GET("/repos/{owner}/{repository}/issues")
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Single<List<Issue>> getIssues(@Header("Authorization") String credentials, @Path("owner") String owner, @Path("repository") String repository);
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}

‎com.vogella.android.github.issuetracker/app/src/main/java/com/vogella/android/github/issuetracker/Issue.java‎

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package com.vogella.android.github.issuetracker;
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class Issue {
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public int id;
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public String title;
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@Override
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public String toString() {
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return id + " - " + title;
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}
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}

‎com.vogella.android.github.issuetracker/app/src/main/java/com/vogella/android/github/issuetracker/MainActivity.java‎

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package com.vogella.android.github.issuetracker;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.support.v7.widget.Toolbar;
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import android.view.KeyEvent;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.inputmethod.EditorInfo;
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import android.widget.EditText;
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import android.widget.TextView;
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import android.widget.Toast;
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import java.util.List;
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import io.reactivex.observers.DisposableSingleObserver;
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public class MainActivity extends AppCompatActivity implements CredentialsDialog.ICredentialsDialogListener {
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EditText ownerEditText;
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EditText repositoryEditText;
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TextView issuesTextView;
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private String password = "";
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private String username= "";
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private CommunicationController communicationController;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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Toolbar toolbar = (Toolbar) findViewById(R.id.my_toolbar);
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setSupportActionBar(toolbar);
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ownerEditText = (EditText) findViewById(R.id.owner_edittext);
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repositoryEditText = (EditText) findViewById(R.id.repository_edittext);
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repositoryEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
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@Override
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public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
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if(actionId == EditorInfo.IME_ACTION_DONE){
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queryForIssues();
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return true;
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}
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return false;
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}
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});
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issuesTextView = (TextView) findViewById(R.id.issues_text);
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communicationController = new CommunicationController();
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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getMenuInflater().inflate(R.menu.menu_main, menu);
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return true;
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch (item.getItemId()) {
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case R.id.menu_credentials:
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showCredentialsDialog();
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return true;
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case R.id.menu_refresh:
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queryForIssues();
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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private DisposableSingleObserver<List<Issue>> getIssuesObserver() {
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return new DisposableSingleObserver<List<Issue>>() {
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@Override
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public void onSuccess(List<Issue> value) {
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for (Issue issues : value) {
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issuesTextView.append(issues.toString() + "\n");
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}
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}
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@Override
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public void onError(Throwable e) {
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Toast.makeText(MainActivity.this, "Cannot load issues.", Toast.LENGTH_SHORT).show();
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}
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};
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}
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private void showCredentialsDialog() {
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CredentialsDialog dialog = new CredentialsDialog();
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Bundle arguments = new Bundle();
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arguments.putString("username", username);
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arguments.putString("password", password);
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dialog.setArguments(arguments);
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dialog.show(getSupportFragmentManager(), "credentialsDialog");
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}
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@Override
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public void onDialogPositiveClick(String username, String password) {
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this.username = username;
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this.password = password;
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}
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private void queryForIssues() {
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issuesTextView.setText("");
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String owner = ownerEditText.getText().toString();
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String repository = repositoryEditText.getText().toString();
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if(!username.isEmpty() && !password.isEmpty() && !owner.isEmpty() && !repository.isEmpty()) {
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communicationController.loadIssues(username, password, getIssuesObserver(), owner, repository);
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}
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}
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}

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