自动补齐控件

1.在XML配置控件（两种有MultiAutoCompleteTextView和AutoCompleteTextView）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
     >
    <MultiAutoCompleteTextView
    android:id="@+id/tv_multiAuto"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text=""
    android:completionThreshold="1"
    />

    <AutoCompleteTextView
    android:id="@+id/tv_auto"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text=""
    android:completionThreshold="1" />
</LinearLayout>

2.实例化两种控件

private MultiAutoCompleteTextView multiAutoComplete;
private AutoCompleteTextView autoCompleteTextView;

this.multiAutoComplete = (MultiAutoCompleteTextView) findViewById(R.id.tv_multiAuto);
this.autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.tv_auto);

3.准备数据源，在下拉列表显示的数据

String[] datas = new String[]{
        "Hello",
        "Hay",
        "Ha",
        "World",
        "Word",
        "Wa!"
};

4.设置适配器，为控件填充数据

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1,datas);
this.multiAutoComplete.setAdapter(adapter);
this.autoCompleteTextView.setAdapter(adapter);

5.假如是多个补齐控件还可以设置间隔符

this.multiAutoComplete.setTokenizer(
        new MultiAutoCompleteTextView.CommaTokenizer());