[android] expose Formatted text-field setter

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/Layer.java

@@ -2,10 +2,11 @@ package com.mapbox.mapboxsdk.style.layers;
 
 import android.support.annotation.Keep;
 import android.support.annotation.NonNull;
-
 import android.support.annotation.Nullable;
+
 import com.google.gson.JsonElement;
 import com.mapbox.mapboxsdk.style.expressions.Expression;
+import com.mapbox.mapboxsdk.style.types.Formatted;
 import com.mapbox.mapboxsdk.utils.ThreadUtils;
 
 /**
@@ -137,9 +138,12 @@ public abstract class Layer {
 
   @Nullable
   private Object convertValue(@Nullable Object value) {
-    if (value != null && value instanceof Expression) {
+    if (value instanceof Expression) {
       return ((Expression) value).toArray();
+    } else if (value instanceof Formatted) {
+      return ((Formatted) value).toArray();
+    } else {
+      return value;
     }
-    return value;
   }
 }

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/PropertyFactory.java

@@ -5,6 +5,7 @@ package com.mapbox.mapboxsdk.style.layers;
 import android.support.annotation.ColorInt;
 
 import com.mapbox.mapboxsdk.style.expressions.Expression;
+import com.mapbox.mapboxsdk.style.types.Formatted;
 import static com.mapbox.mapboxsdk.utils.ColorUtils.colorToRgbaString;
 
 /**
@@ -2134,6 +2135,16 @@ public class PropertyFactory {
     return new LayoutPropertyValue<>("text-field", value);
   }
 
+  /**
+   * Value to use for a text label. If a plain `string` is provided, it will be treated as a `formatted` with default/inherited formatting options.
+   *
+   * @param value a Formatted value
+   * @return property wrapper around Formatted
+   */
+  public static PropertyValue<Formatted> textField(Formatted value) {
+    return new LayoutPropertyValue<>("text-field", value);
+  }
+
   /**
    * Value to use for a text label. If a plain `string` is provided, it will be treated as a `formatted` with default/inherited formatting options.
    *

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/property_factory.java.ejs

@@ -9,6 +9,7 @@ package com.mapbox.mapboxsdk.style.layers;
 import android.support.annotation.ColorInt;
 
 import com.mapbox.mapboxsdk.style.expressions.Expression;
+import com.mapbox.mapboxsdk.style.types.Formatted;
 import static com.mapbox.mapboxsdk.utils.ColorUtils.colorToRgbaString;
 
 /**
@@ -73,7 +74,8 @@ public class PropertyFactory {
   public static PropertyValue<String> <%- camelizeWithLeadingLowercase(property.name) %>(String value) {
     return new LayoutPropertyValue<>("<%-  property.name %>", value);
   }
-<% } else {-%>
+
+<% } -%>
   /**
    * <%- propertyFactoryMethodDoc(property) %>
    *
@@ -83,7 +85,6 @@ public class PropertyFactory {
   public static PropertyValue<<%- propertyType(property) %>> <%- camelizeWithLeadingLowercase(property.name) %>(<%- propertyTypeAnnotation(property) %><%- iff(() => propertyTypeAnnotation(property), " ") %><%- propertyType(property) %> value) {
     return new LayoutPropertyValue<>("<%-  property.name %>", value);
   }
-<% } -%>
 
   /**
    * <%- propertyFactoryMethodDoc(property) %>

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/types/Formatted.java

@@ -14,21 +14,12 @@ import java.util.Arrays;
 public class Formatted {
   private final FormattedSection[] formattedSections;
 
-  /**
-   * Create a new formatted text.
-   *
-   * @param formattedSection section with formatting options
-   */
-  public Formatted(FormattedSection formattedSection) {
-    this(new FormattedSection[] {formattedSection});
-  }
-
   /**
    * Create a new formatted text.
    *
    * @param formattedSections sections with formatting options
    */
-  public Formatted(FormattedSection[] formattedSections) {
+  public Formatted(FormattedSection... formattedSections) {
     this.formattedSections = formattedSections;
   }
 
@@ -41,6 +32,14 @@ public class Formatted {
     return formattedSections;
   }
 
+  public Object[] toArray() {
+    Object[] sections = new Object[formattedSections.length];
+    for (int i = 0; i < formattedSections.length; i++) {
+      sections[i] = formattedSections[i].toArray();
+    }
+    return sections;
+  }
+
   @Override
   public boolean equals(@Nullable Object o) {
     if (this == o) {

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/types/FormattedSection.java

@@ -5,6 +5,8 @@ import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
 import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * A component of the {@link Formatted}.
@@ -117,4 +119,11 @@ public class FormattedSection {
     result = 31 * result + Arrays.hashCode(fontStack);
     return result;
   }
+
+  Object[] toArray() {
+    Map<String, Object> params = new HashMap<>();
+    params.put("font-scale", fontScale);
+    params.put("text-font", fontStack);
+    return new Object[] {text, params};
+  }
 }