Fix #198: Use OkHttp3Downloader by default

app/build.gradle

@@ -39,6 +39,8 @@ dependencies {
     compile 'com.android.support:design:25.3.1'
     compile 'com.android.support:exifinterface:25.3.1'
     compile 'com.squareup.picasso:picasso:2.5.2'
+    compile 'com.squareup.okhttp3:okhttp:3.7.0'
+    compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.1.0'
     compile 'com.pkmmte.view:circularimageview:1.1'
     compile 'com.github.peter9870:sparkbutton:master'
     compile 'com.mikhaellopez:circularfillableloaders:1.2.0'

app/src/main/AndroidManifest.xml

@@ -13,7 +13,8 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
-        android:theme="@style/AppTheme">
+        android:theme="@style/AppTheme"
+        android:name=".TuskyApplication">
         <meta-data android:name="firebase_analytics_collection_enabled" android:value="false" />
         <activity android:name=".SplashActivity">
             <intent-filter>

app/src/main/java/com/keylesspalace/tusky/TuskyApplication.java

@@ -0,0 +1,50 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky;
+
+import android.app.Application;
+import android.net.Uri;
+
+import com.squareup.picasso.Picasso;
+import com.jakewharton.picasso.OkHttp3Downloader;
+import okhttp3.OkHttpClient;
+
+public class TuskyApplication extends Application {
+    @Override
+    public void onCreate() {
+        // Initialize Picasso configuration
+        Picasso.Builder builder = new Picasso.Builder(this);
+        builder.downloader(new OkHttp3Downloader(new OkHttpClient()));
+        if (BuildConfig.DEBUG) {
+            builder.listener(new Picasso.Listener() {
+                @Override
+                public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
+                    exception.printStackTrace();
+                }
+            });
+        }
+
+        try {
+            Picasso.setSingletonInstance(builder.build());
+        } catch (IllegalStateException e) {
+            throw new RuntimeException(e);
+        }
+
+        if (BuildConfig.DEBUG) {
+            Picasso.with(this).setLoggingEnabled(true);
+        }
+    }
+}