From 667c47d252ae46b3967281238c4d481deb8fb9e5 Mon Sep 17 00:00:00 2001
From: Camilo Santos <camilossantos.2809@gmail.com>
Date: Fri, 15 Dec 2023 04:20:02 -0300
Subject: [PATCH] Feat: Allow using custom font on android (#487)

* feat: allow using custom font on android

* fix: fallback when a font file doesn't exist

---------

Co-authored-by: camilossantos2809 <camilossantos2809@github.com>
---
 .../picker/ReactPickerManager.java              | 17 +++++++++++++----
 typings/Picker.d.ts                             |  2 ++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/android/src/main/java/com/reactnativecommunity/picker/ReactPickerManager.java b/android/src/main/java/com/reactnativecommunity/picker/ReactPickerManager.java
index 22334aa221..6299432d9f 100644
--- a/android/src/main/java/com/reactnativecommunity/picker/ReactPickerManager.java
+++ b/android/src/main/java/com/reactnativecommunity/picker/ReactPickerManager.java
@@ -8,6 +8,7 @@
 package com.reactnativecommunity.picker;
 
 import android.content.Context;
+import android.content.res.AssetManager;
 import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.Typeface;
@@ -30,12 +31,12 @@
 import com.facebook.react.uimanager.*;
 import com.facebook.react.uimanager.annotations.ReactProp;
 import com.facebook.react.uimanager.events.EventDispatcher;
-
 import com.facebook.yoga.YogaMeasureFunction;
 import com.facebook.yoga.YogaMeasureMode;
 import com.facebook.yoga.YogaMeasureOutput;
 import com.facebook.yoga.YogaNode;
 
+import java.io.IOException;
 import java.util.Map;
 
 import javax.annotation.Nullable;
@@ -373,10 +374,18 @@ private View getView(int position, View convertView, ViewGroup parent, boolean i
         if (style.hasKey("fontSize") && !style.isNull("fontSize") && style.getDouble("fontSize") > 0.1) {
           textView.setTextSize((float)style.getDouble("fontSize"));
         }
-        
+
         if (style.hasKey("fontFamily") && !style.isNull("fontFamily") && style.getString("fontFamily").length() > 0) {
-          Typeface face = Typeface.create(style.getString("fontFamily"), Typeface.NORMAL);
-          textView.setTypeface(face);
+          String fontPath = "fonts/" + style.getString("fontFamily") + ".ttf";
+          AssetManager assetManager = convertView.getContext().getAssets();
+          try {
+            assetManager.open(fontPath);
+            Typeface face = Typeface.createFromAsset(convertView.getContext().getAssets(), fontPath);
+            textView.setTypeface(face);
+          } catch (IOException e) {
+            Typeface face = Typeface.create(style.getString("fontFamily"), Typeface.NORMAL);
+            textView.setTypeface(face);
+          }
         }
       }
 
diff --git a/typings/Picker.d.ts b/typings/Picker.d.ts
index 5ebb2d36a6..67a1e4b60f 100644
--- a/typings/Picker.d.ts
+++ b/typings/Picker.d.ts
@@ -24,6 +24,8 @@ export interface PickerItemProps<T = ItemValue> {
    *   - 'backgroundColor'
    *   - 'fontSize'
    *   - 'fontFamily'
+   * 
+   * The 'fontFamily' value expects the font file (.ttf) to be present in the "assets/fonts" directory
    *
    * @platform android
    */