add generic circular avatars for contacts and use slightly smaller, more material like font size

src/main/java/com/owncloud/android/ui/TextDrawable.java

@@ -28,6 +28,7 @@ import android.graphics.PixelFormat;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.NonNull;
 
+import com.owncloud.android.authentication.AccountUtils;
 import com.owncloud.android.utils.BitmapUtils;
 
 import java.io.UnsupportedEncodingException;
@@ -95,9 +96,26 @@ public class TextDrawable extends Drawable {
     @NonNull
     public static TextDrawable createAvatar(String accountName, float radiusInDp) throws
             UnsupportedEncodingException, NoSuchAlgorithmException {
-        int[] rgb = BitmapUtils.calculateRGB(accountName);
+        String username = AccountUtils.getAccountUsername(accountName);
+        return createNamedAvatar(username, radiusInDp);
+    }
+
+    /**
+     * creates an avatar in form of a TextDrawable with the first letter of a name in a circle with the
+     * given radius.
+     *
+     * @param name the name
+     * @param radiusInDp  the circle's radius
+     * @return the avatar as a TextDrawable
+     * @throws UnsupportedEncodingException if the charset is not supported when calculating the color values
+     * @throws NoSuchAlgorithmException if the specified algorithm is not available when calculating the color values
+     */
+    @NonNull
+    public static TextDrawable createNamedAvatar(String name, float radiusInDp) throws
+            UnsupportedEncodingException, NoSuchAlgorithmException {
+        int[] rgb = BitmapUtils.calculateRGB(name);
         TextDrawable avatar = new TextDrawable(
-                accountName.substring(0, 1).toUpperCase(), rgb[0], rgb[1], rgb[2], radiusInDp);
+                name.substring(0, 1).toUpperCase(), rgb[0], rgb[1], rgb[2], radiusInDp);
         return avatar;
     }
 

src/main/java/com/owncloud/android/ui/activity/ContactListFragment.java

@@ -53,6 +53,7 @@ import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.files.services.FileDownloader;
 import com.owncloud.android.lib.common.utils.Log_OC;
 import com.owncloud.android.services.ContactsImportJob;
+import com.owncloud.android.ui.TextDrawable;
 import com.owncloud.android.ui.fragment.FileFragment;
 import com.owncloud.android.utils.BitmapUtils;
 import com.owncloud.android.utils.PermissionUtil;
@@ -367,6 +368,16 @@ class ContactListAdapter extends RecyclerView.Adapter<ContactListFragment.Contac
         final VCard vcard = vCards.get(holder.getAdapterPosition());
 
         if (vcard != null) {
+            // name
+            StructuredName name = vcard.getStructuredName();
+            if (name != null) {
+                String first = (name.getGiven() == null) ? "" : name.getGiven() + " ";
+                String last = (name.getFamily() == null) ? "" : name.getFamily();
+                holder.getName().setText(first + last);
+            } else {
+                holder.getName().setText("");
+            }
+
             // photo
             if (vcard.getPhotos().size() > 0) {
                 byte[] data = vcard.getPhotos().get(0).getData();
@@ -377,7 +388,16 @@ class ContactListAdapter extends RecyclerView.Adapter<ContactListFragment.Contac
 
                 holder.getBadge().setImageDrawable(drawable);
             } else {
-                holder.getBadge().setImageResource(R.drawable.ic_user);
+                try {
+                    holder.getBadge().setImageDrawable(
+                            TextDrawable.createNamedAvatar(
+                                    holder.getName().getText().toString(),
+                                    context.getResources().getDimension(R.dimen.list_item_avatar_icon_radius)
+                            )
+                    );
+                } catch (Exception e) {
+                    holder.getBadge().setImageResource(R.drawable.ic_user);
+                }
             }
 
             // Checkbox
@@ -393,16 +413,6 @@ class ContactListAdapter extends RecyclerView.Adapter<ContactListFragment.Contac
                     }
                 }
             });
-
-            // name
-            StructuredName name = vcard.getStructuredName();
-            if (name != null) {
-                String first = (name.getGiven() == null) ? "" : name.getGiven() + " ";
-                String last = (name.getFamily() == null) ? "" : name.getFamily();
-                holder.getName().setText(first + last);
-            } else {
-                holder.getName().setText("");
-            }
         }
     }
 

src/main/java/com/owncloud/android/utils/BitmapUtils.java

@@ -28,7 +28,6 @@ import android.media.ExifInterface;
 import android.support.v4.graphics.drawable.RoundedBitmapDrawable;
 import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;
 
-import com.owncloud.android.authentication.AccountUtils;
 import com.owncloud.android.lib.common.utils.Log_OC;
 
 import java.io.UnsupportedEncodingException;
@@ -265,15 +264,14 @@ public class BitmapUtils {
     /**
      * calculates the RGB value based on a given account name.
      *
-     * @param accountName The account name
+     * @param name The name
      * @return corresponding RGB color
      * @throws UnsupportedEncodingException if the charset is not supported
      * @throws NoSuchAlgorithmException if the specified algorithm is not available
      */
-    public static int[] calculateRGB(String accountName) throws UnsupportedEncodingException, NoSuchAlgorithmException {
+    public static int[] calculateRGB(String name) throws UnsupportedEncodingException, NoSuchAlgorithmException {
         // using adapted algorithm from /core/js/placeholder.js:50
-        String username = AccountUtils.getAccountUsername(accountName);
-        byte[] seed = username.getBytes("UTF-8");
+        byte[] seed = name.getBytes("UTF-8");
         MessageDigest md = MessageDigest.getInstance("MD5");
         Integer seedMd5Int = String.format(Locale.ROOT, "%032x",
                 new BigInteger(1, md.digest(seed))).hashCode();

src/main/res/layout/contactlist_list_item.xml

@@ -25,10 +25,9 @@
 
     <ImageView
         android:id="@+id/contactlist_item_icon"
-        android:layout_width="@dimen/standard_list_item_size"
-        android:layout_height="@dimen/standard_list_item_size"
-        android:layout_margin="0dp"
-        android:padding="7dp"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:layout_margin="16dp"
         android:scaleType="centerCrop"
         android:src="@drawable/ic_user"/>
 
@@ -42,6 +41,6 @@
         android:ellipsize="marquee"
         android:gravity="center_vertical"
         android:maxLines="1"
-        android:textAppearance="?android:attr/textAppearanceLarge"/>
+        android:textAppearance="?android:attr/textAppearanceListItem"/>
 
 </LinearLayout>