为何我的设置 android:completionThreshold="2",也可以检索数据源
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<AutoCompleteTextView
android:completionThreshold="2"
android:id="@+id/autoCompleteTextView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入的关键字" >
</AutoCompleteTextView>
</LinearLayout>
