package com.ab.demo1;

import android.support.v7.app.ActionBarActivity;

import android.support.v4.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.widget.MultiAutoCompleteTextView;

public class MainActivity extends ActionBarActivity {

private AutoCompleteTextView acTextView;

//实例化一个对象。

private MultiAutoCompleteTextView macTextView;

private String[] res={"beijing1","beijing2","beijing3","shanghai1","shanghai2"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

/*

 * 1.初始化控件

 * 2.需要一个适配器

 * 3.初始化数据源--去匹配文本框输入的内容

 * 4.将adapter与当前AutoCompleteTextView绑定

 * 

 * 5.设置分隔符

 */

       acTextView =(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);

       ArrayAdapter<String> adapter= new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,res);

       acTextView.setAdapter(adapter);

       macTextView =(MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView1);

       macTextView.setAdapter(adapter);

      //设置以逗号为分隔符

       macTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

        if (savedInstanceState == null) {

            getSupportFragmentManager().beginTransaction()

                    .add(R.id.container, new PlaceholderFragment())

                    .commit();

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    /**

     * A placeholder fragment containing a simple view.

     */

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {

        }

        @Override

        public View onCreateView(LayoutInflater inflater, ViewGroup container,

                Bundle savedInstanceState) {

            View rootView = inflater.inflate(R.layout.fragment_main, container, false);

            return rootView;

        }

    }

}

能帮我看看是哪个地方出错了吗?