Implement account switcher as action-bar navigation spinner.

remoting/android/java/src/org/chromium/chromoting/AccountsAdapter.java

+// Copyright 2014 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.chromoting;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+/** SpinnerAdapter class used for the ActionBar accounts spinner. */
+public class AccountsAdapter extends ArrayAdapter<Account> {
+    private LayoutInflater mInflater;
+
+    public AccountsAdapter(Context context, Account[] accounts) {
+        // ArrayAdapter only uses the |resource| parameter to return a View from getView() and
+        // getDropDownView(). But these methods are overridden here to return custom Views, so it's
+        // OK to provide 0 as the resource for the base class.
+        super(context, 0, accounts);
+        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        View view = mInflater.inflate(R.layout.account_selected, parent, false);
+        Account account = getItem(position);
+        TextView target = (TextView)view.findViewById(R.id.account_name);
+        target.setText(account.name);
+        return view;
+    }
+
+    @Override
+    public View getDropDownView(int position, View convertView, ViewGroup parent) {
+        TextView view = (TextView)mInflater.inflate(R.layout.account_dropdown, parent, false);
+        Account account = getItem(position);
+        view.setText(account.name);
+        return view;
+    }
+}