Provide fallback initials for contacts wtihout avatars

Signed-off-by: Stefan Niedermann <info@niedermann.it>

2 files changed, 38 insertions, 6 deletions

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/card/attachments/picker/ContactItemViewHolder.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/card/attachments/picker/ContactItemViewHolder.java
index 272fcdca3..3a3eee3f9 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/card/attachments/picker/ContactItemViewHolder.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/card/attachments/picker/ContactItemViewHolder.java
@@ -1,7 +1,9 @@
 package it.niedermann.nextcloud.deck.ui.card.attachments.picker;
 
 import android.graphics.Bitmap;
+import android.graphics.drawable.ColorDrawable;
 import android.net.Uri;
+import android.text.TextUtils;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -15,6 +17,10 @@ import java.util.function.Consumer;
 import it.niedermann.nextcloud.deck.R;
 import it.niedermann.nextcloud.deck.databinding.ItemPickerUserBinding;
 
+import static android.view.View.GONE;
+import static android.view.View.VISIBLE;
+import static it.niedermann.nextcloud.deck.util.VCardUtil.getColorBasedOnDisplayName;
+
 public class ContactItemViewHolder extends RecyclerView.ViewHolder {
 
     private final ItemPickerUserBinding binding;
@@ -27,11 +33,25 @@ public class ContactItemViewHolder extends RecyclerView.ViewHolder {
     public void bind(@NonNull Uri uri, @Nullable Bitmap image, @NonNull String displayName, @NonNull Consumer<Uri> onSelect) {
         itemView.setOnClickListener((v) -> onSelect.accept(uri));
         binding.displayName.setText(displayName);
-        Glide.with(itemView.getContext())
-                .load(image)
-                .placeholder(R.drawable.ic_person_grey600_24dp)
-                .apply(RequestOptions.circleCropTransform())
-                .into(binding.avatar);
+        if (image == null) {
+            binding.initials.setVisibility(VISIBLE);
+            binding.initials.setText(TextUtils.isEmpty(displayName)
+                    ? null
+                    : String.valueOf(displayName.charAt(0))
+            );
+            Glide.with(itemView.getContext())
+                    .load(new ColorDrawable(getColorBasedOnDisplayName(itemView.getContext(), displayName)))
+                    .apply(RequestOptions.circleCropTransform())
+                    .into(binding.avatar);
+        } else {
+            binding.initials.setVisibility(GONE);
+            binding.initials.setText(null);
+            Glide.with(itemView.getContext())
+                    .load(image)
+                    .placeholder(R.drawable.ic_person_grey600_24dp)
+                    .apply(RequestOptions.circleCropTransform())
+                    .into(binding.avatar);
+        }
     }
 
     public void bindError() {
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/util/VCardUtil.java b/app/src/main/java/it/niedermann/nextcloud/deck/util/VCardUtil.java
index b0e971082..274af332d 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/util/VCardUtil.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/util/VCardUtil.java
@@ -3,12 +3,17 @@ package it.niedermann.nextcloud.deck.util;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.database.Cursor;
+import android.graphics.Color;
 import android.net.Uri;
 import android.provider.ContactsContract;
 
+import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 
 import java.util.NoSuchElementException;
+import java.util.Objects;
+
+import it.niedermann.nextcloud.deck.R;
 
 public class VCardUtil {
 
@@ -19,7 +24,7 @@ public class VCardUtil {
     public static Uri getVCardContentUri(@NonNull Context context, @NonNull Uri contactUri) throws NoSuchElementException {
         final ContentResolver cr = context.getContentResolver();
         try (final Cursor cursor = cr.query(contactUri, null, null, null, null)) {
-            if (cursor.moveToFirst()) {
+            if (cursor != null && cursor.moveToFirst()) {
                 final String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
                 return Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
             } else {
@@ -27,4 +32,11 @@ public class VCardUtil {
             }
         }
     }
+
+    @ColorInt
+    public static int getColorBasedOnDisplayName(@NonNull Context context, @NonNull String displayName) {
+        final String[] colors = context.getResources().getStringArray(R.array.board_default_colors);
+        final int hashCode = Objects.hashCode(displayName);
+        return Color.parseColor(colors[(hashCode < 0 ? hashCode * -1 : hashCode) % colors.length]);
+    }
 }