AutoCompleteTextView 默认是输入二个字符

XML文件的代码

<AutoCompleteTextView
	 android:id="@+id/antotext"
	 android:layout_width="fill_parent"
         android:layout_height="wrap_content"
/>

java文件的代码

private static final String[] AUTO_CONTENT={"a","b","c","ab","bc","ca","abc","acb","bca","b","ab","ade","abcdf"};
private AutoCompleteTextView autoText;
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //创建ArrayAdapter对象
        ArrayAdapter<String> auto_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, AUTO_CONTENT);
        //获取AutoCompleteTextView对象
        autoText=(AutoCompleteTextView) this.findViewById(R.id.antotext);      
        //将AutoCompleteTextView与ArrayAdapter进行绑定
        autoText.setAdapter(auto_adapter);
}

运行结果图:

由上，AutoCompleteTextView 默认是输入二个字符自动提示。如果想设置输入第一个字符就进行提示，添加代码如下:

//设置输入第一个字符就进行提示
autoText.setThreshold(1); 

运行结果图：