Added BaseAdapter.setAutofillOptions()

Also changed ArrayAdapter to use it, when set.

Fixes: 37518906
Test: cts-tradefed run commandAndExit cts-dev -m CtsWidgetTestCases  -t android.widget.cts.BaseAdapterTest
Test: cts-tradefed run commandAndExit cts-dev -m CtsWidgetTestCases  -t android.widget.cts.ArrayAdapterTest
Test: m update-api

Change-Id: I5e883555b0fb9d084b57b9239595bf0632fc41af

api/current.txt

@@ -49515,6 +49515,7 @@ package android.widget {
     method public void notifyDataSetChanged();
     method public void notifyDataSetInvalidated();
     method public void registerDataSetObserver(android.database.DataSetObserver);
+    method public void setAutofillOptions(java.lang.CharSequence...);
     method public void unregisterDataSetObserver(android.database.DataSetObserver);
   }
 

api/system-current.txt

@@ -53433,6 +53433,7 @@ package android.widget {
     method public void notifyDataSetChanged();
     method public void notifyDataSetInvalidated();
     method public void registerDataSetObserver(android.database.DataSetObserver);
+    method public void setAutofillOptions(java.lang.CharSequence...);
     method public void unregisterDataSetObserver(android.database.DataSetObserver);
   }
 

api/test-current.txt

@@ -49931,6 +49931,7 @@ package android.widget {
     method public void notifyDataSetChanged();
     method public void notifyDataSetInvalidated();
     method public void registerDataSetObserver(android.database.DataSetObserver);
+    method public void setAutofillOptions(java.lang.CharSequence...);
     method public void unregisterDataSetObserver(android.database.DataSetObserver);
   }
 

core/java/android/widget/ArrayAdapter.java

@@ -526,6 +526,13 @@ public class ArrayAdapter<T> extends BaseAdapter implements Filterable, ThemedSp
      */
     @Override
     public CharSequence[] getAutofillOptions() {
+        // First check if app developer explicitly set them.
+        final CharSequence[] explicitOptions = super.getAutofillOptions();
+        if (explicitOptions != null) {
+            return explicitOptions;
+        }
+
+        // Otherwise, only return options that came from static resources.
         if (!mObjectsFromResources || mObjects == null || mObjects.isEmpty()) {
             return null;
         }

core/java/android/widget/BaseAdapter.java

@@ -16,6 +16,7 @@
 
 package android.widget;
 
+import android.annotation.Nullable;
 import android.database.DataSetObservable;
 import android.database.DataSetObserver;
 import android.view.View;
@@ -29,6 +30,7 @@ import android.view.ViewGroup;
  */
 public abstract class BaseAdapter implements ListAdapter, SpinnerAdapter {
     private final DataSetObservable mDataSetObservable = new DataSetObservable();
+    private CharSequence[] mAutofillOptions;
 
     public boolean hasStableIds() {
         return false;
@@ -82,4 +84,16 @@ public abstract class BaseAdapter implements ListAdapter, SpinnerAdapter {
     public boolean isEmpty() {
         return getCount() == 0;
     }
+
+    @Override
+    public CharSequence[] getAutofillOptions() {
+        return mAutofillOptions;
+    }
+
+    /**
+     * Sets the value returned by {@link #getAutofillOptions()}
+     */
+    public void setAutofillOptions(@Nullable CharSequence... options) {
+        mAutofillOptions = options;
+    }
 }