Migrate LocalAuthorSpinnerAdapter to XML, add identicons

briar-android/res/layout/dropdown_author.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:gravity="center_vertical">
+
+	<im.delight.android.identicons.SymmetricIdenticon
+		android:id="@+id/identiconView"
+		android:layout_width="@dimen/dropdown_picture_size"
+		android:layout_height="@dimen/dropdown_picture_size"/>
+
+	<TextView
+		android:id="@+id/nameView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginLeft="@dimen/margin_medium"
+		android:layout_marginStart="@dimen/margin_medium"
+		android:ellipsize="end"
+		android:singleLine="true"
+		android:textSize="@dimen/text_size_medium"
+		tools:text="This is a name of an author. It can be quite long."/>
+
+</LinearLayout>
\ No newline at end of file

briar-android/res/values/dimens.xml

@@ -26,4 +26,6 @@
 
 	<dimen name="listitem_height_one_line_avatar">56dp</dimen>
 
+	<dimen name="dropdown_picture_size">32dp</dimen>
+
 </resources>

briar-android/src/org/briarproject/android/identity/LocalAuthorSpinnerAdapter.java

 package org.briarproject.android.identity;
 
 import android.content.Context;
+import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
@@ -8,14 +9,14 @@ import android.widget.SpinnerAdapter;
 import android.widget.TextView;
 
 import org.briarproject.R;
-import org.briarproject.android.util.LayoutUtils;
 
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 
-import static android.text.TextUtils.TruncateAt.END;
+import im.delight.android.identicons.IdenticonView;
+
 import static org.briarproject.android.identity.LocalAuthorItem.ANONYMOUS;
 import static org.briarproject.android.identity.LocalAuthorItem.NEW;
 
@@ -49,17 +50,32 @@ implements SpinnerAdapter {
 	@Override
 	public View getDropDownView(int position, View convertView,
 			ViewGroup parent) {
-		TextView name = new TextView(ctx);
-		name.setTextSize(18);
-		name.setSingleLine();
-		name.setEllipsize(END);
-		int pad = LayoutUtils.getPadding(ctx);
-		name.setPadding(pad, pad, pad, pad);
+		View view;
+		if (convertView == null) {
+			LayoutInflater inflater =
+					(LayoutInflater) ctx
+							.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+			view = inflater.inflate(R.layout.dropdown_author, parent, false);
+		} else
+			view = convertView;
+
+		TextView name = (TextView) view.findViewById(R.id.nameView);
+		IdenticonView identicon =
+				(IdenticonView) view.findViewById(R.id.identiconView);
+
 		LocalAuthorItem item = getItem(position);
-		if (item == ANONYMOUS) name.setText(R.string.anonymous);
-		else if (item == NEW) name.setText(R.string.new_identity_item);
-		else name.setText(item.getLocalAuthor().getName());
-		return name;
+		if (item == ANONYMOUS) {
+			name.setText(R.string.anonymous);
+			identicon.setVisibility(View.INVISIBLE);
+		} else if (item == NEW) {
+			name.setText(R.string.new_identity_item);
+			identicon.setVisibility(View.INVISIBLE);
+		} else {
+			name.setText(item.getLocalAuthor().getName());
+			identicon.setVisibility(View.VISIBLE);
+			identicon.show(item.getLocalAuthor().getId().getBytes());
+		}
+		return view;
 	}
 
 	public LocalAuthorItem getItem(int position) {
@@ -78,15 +94,7 @@ implements SpinnerAdapter {
 	}
 
 	public View getView(int position, View convertView, ViewGroup parent) {
-		TextView name = new TextView(ctx);
-		name.setTextSize(18);
-		name.setSingleLine();
-		name.setEllipsize(END);
-		LocalAuthorItem item = getItem(position);
-		if (item == ANONYMOUS) name.setText(R.string.anonymous);
-		else if (item == NEW) name.setText(R.string.new_identity_item);
-		else name.setText(item.getLocalAuthor().getName());
-		return name;
+		return getDropDownView(position, convertView, parent);
 	}
 
 	@Override