View Source should always open a ChromeCustomTab, fix #41

frontend/android/src/main/java/com/jakewharton/sdksearch/ui/CustomTabsHelper.kt

@@ -0,0 +1,14 @@
+package com.jakewharton.sdksearch.ui
+
+import android.content.Context
+import android.support.customtabs.CustomTabsIntent
+import com.jakewharton.sdksearch.R
+
+internal class CustomTabsHelper {
+  companion object {
+    fun intent(context: Context): CustomTabsIntent = builder(context).build()
+    fun builder(context: Context): CustomTabsIntent.Builder = CustomTabsIntent.Builder()
+            .setToolbarColor(context.getColor(R.color.green))
+            .addDefaultShareMenuItem()
+  }
+}

frontend/android/src/main/java/com/jakewharton/sdksearch/ui/OpenDocumentationItemHandler.kt

@@ -19,21 +19,20 @@ internal class OpenDocumentationItemHandler(
   override fun invoke(item: Item) {
     val uri = baseUrl.resolve(item.link).toUri()
     val sourceUri = androidReference.sourceUrl(item.packageName, item.className)?.toUri()
-    CustomTabsIntent.Builder()
-        .setToolbarColor(context.getColor(R.color.green))
-        .addDefaultShareMenuItem()
-        .apply {
-          if (sourceUri != null) {
-            val sourceIntent = Intent(Intent.ACTION_VIEW, sourceUri)
-            val pendingIntent = PendingIntent.getActivity(context, 123, sourceIntent, 0)
-            setActionButton(
-                BitmapFactory.decodeResource(context.resources, R.drawable.ic_code_black_24dp),
-                context.getString(R.string.view_class_source, item.className),
-                pendingIntent,
-                true)
+    CustomTabsHelper.builder(context).apply {
+        if (sourceUri != null) {
+          val sourceIntent = CustomTabsHelper.intent(context).intent.apply {
+            data = sourceUri
           }
+          val pendingIntent = PendingIntent.getActivity(context, 123, sourceIntent, 0)
+          setActionButton(
+                  BitmapFactory.decodeResource(context.resources, R.drawable.ic_code_black_24dp),
+                  context.getString(R.string.view_class_source, item.className),
+                  pendingIntent,
+                  true)
         }
-        .build()
-        .launchUrl(context, uri)
+      }
+      .build()
+      .launchUrl(context, uri)
   }
 }

frontend/android/src/main/java/com/jakewharton/sdksearch/ui/OpenSourceItemHandler.kt

@@ -1,7 +1,6 @@
 package com.jakewharton.sdksearch.ui
 
 import android.content.Context
-import android.support.customtabs.CustomTabsIntent
 import android.widget.Toast
 import com.jakewharton.sdksearch.R
 import com.jakewharton.sdksearch.store.Item
@@ -15,11 +14,7 @@ internal class OpenSourceItemHandler(
   override fun invoke(item: Item) {
     val url = androidReference.sourceUrl(item.packageName, item.className)
     if (url != null) {
-      CustomTabsIntent.Builder()
-          .setToolbarColor(context.getColor(R.color.green))
-          .addDefaultShareMenuItem()
-          .build()
-          .launchUrl(context, url.toUri())
+      CustomTabsHelper.intent(context).launchUrl(context, url.toUri())
     } else {
       Toast.makeText(context, R.string.unknown_source, Toast.LENGTH_SHORT).show()
     }