Autofill address editor in PaymentRequest UI.

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorDropdownField.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorDropdownField.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorDropdownField.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorDropdownField.java
new file mode 100644
index 0000000000000000000000000000000000000000..959310adab568ddab7ea51a6e14e0618d535f0c1
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/EditorDropdownField.java
@@ -0,0 +1,88 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.payments.ui;
+
+import android.content.Context;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemSelectedListener;
+import android.widget.ArrayAdapter;
+import android.widget.Spinner;
+import android.widget.TextView;
+
+import org.chromium.chrome.browser.preferences.autofill.AutofillProfileBridge.DropdownKeyValue;
+
+import java.util.List;
+
+/**
+ * Helper class for creating a dropdown view with a label.
+ */
+class EditorDropdownField {
+    private final EditorFieldModel mFieldModel;
+    private final TextView mLabel;
+    private final Spinner mDropdown;
+    private int mSelectedIndex;
+
+    /**
+     * Builds a dropdown view.
+     *
+     * @param context         The application context to use when creating widgets.
+     * @param fieldModel      The data model of the dropdown.
+     * @param changedCallback The callback to invoke after user's dropdwn item selection has been
+     *                        processed.
+     */
+    public EditorDropdownField(Context context, final EditorFieldModel fieldModel,
+            final Runnable changedCallback) {
+        assert fieldModel.getInputTypeHint() == EditorFieldModel.INPUT_TYPE_HINT_DROPDOWN;
+        mFieldModel = fieldModel;
+
+        mLabel = new TextView(context);
+        mLabel.setText(mFieldModel.getLabel());
+
+        final List<DropdownKeyValue> dropdownKeyValues = mFieldModel.getDropdownKeyValues();
+        for (int j = 0; j < dropdownKeyValues.size(); j++) {
+            if (dropdownKeyValues.get(j).getKey().equals(mFieldModel.getValue())) {
+                mSelectedIndex = j;
+                break;
+            }
+        }
+
+        ArrayAdapter<DropdownKeyValue> adapter = new ArrayAdapter<DropdownKeyValue>(context,
+                android.R.layout.simple_spinner_item, dropdownKeyValues);
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+
+        mDropdown = new Spinner(context);
+        mDropdown.setAdapter(adapter);
+        mDropdown.setSelection(mSelectedIndex);
+        mDropdown.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                if (mSelectedIndex != position) {
+                    mSelectedIndex = position;
+                    mFieldModel.setDropdownKey(dropdownKeyValues.get(position).getKey(),
+                            changedCallback);
+                }
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {}
+        });
+    }
+
+    /** @return The EditorFieldModel that the EditorDropdownField represents. */
+    public EditorFieldModel getFieldModel() {
+        return mFieldModel;
+    }
+
+    /** @return The label view for the spinner. */
+    public View getLabel() {
+        return mLabel;
+    }
+
+    /** @return The dropdown view itself. */
+    public View getDropdown() {
+        return mDropdown;
+    }
+}