Android自动匹配输入控件AutoCompleteTextV

自动匹配输入控件AutoCompleteTextView和Multi AutoCompleteTextView
属性 android:completionThreshold="3"指输入到第几个字符开始匹配
下面给出实例：

        <AutoCompleteTextView 
            android:id="@+id/AutoCompleteTextView_name"
            android:completionThreshold="3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/content" />
        <MultiAutoCompleteTextView 
            android:id="@+id/AutoCompleteTextView_name2"
            android:completionThreshold="3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/content" />

然后是Java文件：

        //1、首先初始化控件
        //2、获取适配器
        //3、控件与适配器结合
        //4、MultiAutoCompleteTextView要设置分隔符
        String[] res = {"xiaoming","xiaohong","xiaolan","xiaoln"};
        acTV = (AutoCompleteTextView)findViewById(R.id.AutoCompleteTextView_name);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, res); 
        acTV.setAdapter(adapter);
        
        
        macTV = (MultiAutoCompleteTextView) findViewById(R.id.AutoCompleteTextView_name2);
        macTV.setAdapter(adapter);
        //设置分隔符
        macTV.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

这里simple_list_item_1实现的效果还是白字白底的，看不清，求请教怎么改