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David Weiser
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adds Android Retrofit Github example
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‎com.vogella.android.retrofitgithubcomment/.gitignore‎

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

‎com.vogella.android.retrofitgithubcomment/app/.gitignore‎

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/build

‎com.vogella.android.retrofitgithubcomment/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.retrofitgithubcomment"
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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-v7:25.1.1'
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compile 'com.squareup.retrofit2:retrofit:2.1.0'
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compile 'com.squareup.retrofit2:converter-gson:2.1.0'
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compile 'com.google.code.gson:gson:2.6.1'
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testCompile 'junit:junit:4.12'
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}

‎com.vogella.android.retrofitgithubcomment/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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#}

‎com.vogella.android.retrofitgithubcomment/app/src/androidTest/java/com/vogella/android/retrofitgithubcomment/ExampleInstrumentedTest.java‎

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

‎com.vogella.android.retrofitgithubcomment/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.retrofitgithubcomment">
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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: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.retrofitgithubcomment/app/src/main/java/com/vogella/android/retrofitgithubcomment/GithubAPI.java‎

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package com.vogella.android.retrofitgithubcomment;
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import java.util.List;
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import okhttp3.ResponseBody;
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import retrofit2.Call;
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import retrofit2.http.Body;
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import retrofit2.http.GET;
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import retrofit2.http.Header;
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import retrofit2.http.POST;
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import retrofit2.http.Url;
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public interface GithubAPI {
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String ENDPOINT = "https://api.github.com";
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@GET("/issues")
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Call<List<GithubIssue>> getIssues();
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@POST
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Call<ResponseBody> postComment(@Url String url, @Body GithubIssue issue);
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}

‎com.vogella.android.retrofitgithubcomment/app/src/main/java/com/vogella/android/retrofitgithubcomment/GithubIssue.java‎

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package com.vogella.android.retrofitgithubcomment;
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import com.google.gson.annotations.SerializedName;
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/**
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* Created by david on 20.02.17.
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*/
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public class GithubIssue {
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String id;
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String title;
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String comments_url;
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@SerializedName("body")
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String comment;
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public String getTitle() {
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return title;
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}
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public void setTitle(String title) {
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this.title = title;
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}
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public String getCommentsUrl() {
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return comments_url;
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}
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public void setCommentsUrl(String commentsUrl) {
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this.comments_url = commentsUrl;
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}
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public String getComment() {
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return comment;
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}
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public void setComment(String comment) {
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this.comment = comment;
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}
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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.retrofitgithubcomment/app/src/main/java/com/vogella/android/retrofitgithubcomment/MainActivity.java‎

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package com.vogella.android.retrofitgithubcomment;
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import android.os.Bundle;
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import android.support.v7.app.AppCompatActivity;
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import android.util.Log;
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import android.view.View;
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import android.widget.ArrayAdapter;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.Spinner;
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import android.widget.Toast;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import java.io.IOException;
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import java.util.List;
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import okhttp3.Credentials;
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import okhttp3.Interceptor;
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import okhttp3.OkHttpClient;
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import okhttp3.Request;
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import okhttp3.ResponseBody;
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import retrofit2.Call;
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import retrofit2.Callback;
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import retrofit2.Response;
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import retrofit2.Retrofit;
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import retrofit2.converter.gson.GsonConverterFactory;
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public class MainActivity extends AppCompatActivity {
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GithubAPI githubAPI;
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String credentials = Credentials.basic("aUsername", "aPassword");
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Spinner issuesIdSpinner;
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EditText commentEditText;
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Button sendButton;
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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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sendButton = (Button) findViewById(R.id.send_comment_button);
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issuesIdSpinner = (Spinner) findViewById(R.id.issues_spinner);
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issuesIdSpinner.setEnabled(false);
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commentEditText = (EditText) findViewById(R.id.comment_edittext);
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createRetrofitClient();
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}
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private void createRetrofitClient() {
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Gson gson = new GsonBuilder()
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.setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
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.create();
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OkHttpClient okHttpClient = new OkHttpClient.Builder()
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.addInterceptor(new Interceptor() {
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@Override
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public okhttp3.Response intercept(Chain chain) throws IOException {
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Request originalRequest = chain.request();
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Request.Builder builder = originalRequest.newBuilder().header("Authorization",
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credentials);
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Request newRequest = builder.build();
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return chain.proceed(newRequest);
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}
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}).build();
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl(GithubAPI.ENDPOINT)
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.client(okHttpClient)
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.addConverterFactory(GsonConverterFactory.create(gson))
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.build();
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githubAPI = retrofit.create(GithubAPI.class);
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}
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public void onClick(View view) {
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switch (view.getId()) {
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case R.id.loadIssues_button:
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Call<List<GithubIssue>> callIssues = githubAPI.getIssues();
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callIssues.enqueue(issues);
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break;
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case R.id.send_comment_button:
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String newComment = commentEditText.getText().toString();
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if (!newComment.isEmpty()) {
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GithubIssue selectedItem = (GithubIssue) issuesIdSpinner.getSelectedItem();
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selectedItem.setComment(newComment);
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Call<ResponseBody> postComment = githubAPI.postComment(selectedItem.getCommentsUrl(), selectedItem);
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postComment.enqueue(comment);
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} else {
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Toast.makeText(MainActivity.this, "Please enter a comment", Toast.LENGTH_LONG).show();
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}
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break;
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}
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}
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Callback<List<GithubIssue>> issues = new Callback<List<GithubIssue>>() {
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@Override
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public void onResponse(Call<List<GithubIssue>> call, Response<List<GithubIssue>> response) {
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if (response.isSuccessful()) {
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List<GithubIssue> issuesList = response.body();
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GithubIssue[] idArray = issuesList.toArray(new GithubIssue[issuesList.size()]);
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ArrayAdapter<GithubIssue> spinnerAdapter = new ArrayAdapter<GithubIssue>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, idArray);
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issuesIdSpinner.setAdapter(spinnerAdapter);
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issuesIdSpinner.setEnabled(true);
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commentEditText.setEnabled(true);
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sendButton.setEnabled(true);
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} else {
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Log.e("onResponse failure", "Code: " + response.code() + " , Message: " + response.message());
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}
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}
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@Override
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public void onFailure(Call<List<GithubIssue>> call, Throwable t) {
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t.printStackTrace();
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}
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};
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Callback<ResponseBody> comment = new Callback<ResponseBody>() {
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@Override
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public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
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if (response.isSuccessful()) {
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commentEditText.setText("");
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Toast.makeText(MainActivity.this, "Comment created", Toast.LENGTH_LONG).show();
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} else {
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Log.e("onResponse failure", "Code: " + response.code() + " , Message: " + response.message());
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}
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}
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@Override
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public void onFailure(Call<ResponseBody> call, Throwable t) {
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t.printStackTrace();
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}
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};
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}

‎com.vogella.android.retrofitgithubcomment/app/src/main/res/layout/activity_main.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/activity_main"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:paddingBottom="@dimen/activity_vertical_margin"
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android:paddingLeft="@dimen/activity_horizontal_margin"
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android:paddingRight="@dimen/activity_horizontal_margin"
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android:paddingTop="@dimen/activity_vertical_margin"
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tools:context="com.vogella.android.retrofitgithubcomment.MainActivity">
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<Spinner
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android:id="@+id/issues_spinner"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"/>
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<EditText
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:id="@+id/comment_edittext"
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android:layout_below="@id/issues_spinner"
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android:enabled="false"
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android:maxLines="1"
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android:inputType="text"
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android:imeOptions="actionDone"
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android:hint="Your comment" />
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<Button
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android:id="@+id/loadIssues_button"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:layout_alignParentBottom="true"
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android:gravity="center"
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android:onClick="onClick"
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android:text="Load issues" />
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<Button
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:text="Send comment"
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android:layout_above="@id/loadIssues_button"
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android:onClick="onClick"
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android:enabled="false"
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android:id="@+id/send_comment_button"/>
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</RelativeLayout>

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