Android self-paced auto-complete text box Autocompletetextview

The AutoComplete text box (Autocompletetextview) derives from EditText, and in fact he is an edit box, but he has one more function than the normal edit box: When the user enters a certain character, the AutoComplete text box displays a drop-down menu for the user to choose from. When a user selects a menu item, Autocompletetextview automatically fills in the text box as the user chooses.

Common XML attributes and related methods and descriptions supported by Autocompletetextview

XML properties	Related methods	Description
Android:completionhint	Setcompletionhint (charsequence)	Set the prompt title that appears in the drop-down menu
Android:completionthreshold	Setthreshold (int)	Set the user to enter at least a few words of blessing to display the prompt
Android:dropdownheight	Setdropdownheight (int)	Set the height of the drop-down menu
Android:dropdownhorizontaloffset		Sets the horizontal offset between the drop-down menu and the text box, and the drop-down menu is left-aligned with the text box by default
Android:dropdownverticaloffset		Sets the vertical offset between the drop-down menu and the text box, and the drop-down menu follows the text box by default
Android:dropdownwidth	Setdropdownwidth (int)	Set the width of the drop-down menu
Android:popupbackground	Setdropdownbackgroundresource (int)	Setting the background of a drop-down menu

The use of Autocompletetextview is actually very simple, as long as he set a adapter, the adapter encapsulates the autocompletetextview preset hint text, The following example describes an interface layout file that contains Autocompletetextview.

Layout/main.xml:

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6     >7 <!--defines an AutoComplete text box, specifying that a character is entered to prompt -8 <Autocompletetextview9     Android:id= "@+id/auto"Ten Android:layout_width= "Fill_parent"  One Android:layout_height= "Wrap_content"  A Android:completionhint= "Please select the person you like:" - Android:dropdownhorizontaloffset= "20DP" - Android:completionthreshold= "1" the     /> - </LinearLayout>

Com.example.autocomplete.AutoCompleteTextViewTest.java

1  PackageCom.example.autocomplete;2 3 Importandroid.support.v7.app.ActionBarActivity;4 ImportAndroid.support.v7.app.ActionBar;5 Importandroid.support.v4.app.Fragment;6 ImportAndroid.os.Bundle;7 ImportAndroid.view.LayoutInflater;8 ImportAndroid.view.Menu;9 ImportAndroid.view.MenuItem;Ten ImportAndroid.view.View; One ImportAndroid.view.ViewGroup; A ImportAndroid.widget.ArrayAdapter; - ImportAndroid.widget.AutoCompleteTextView; - ImportAndroid.os.Build; the  -  Public classAutocompletetextviewtestextendsactionbaractivity { -  -     //defines a string array, as the text of the hint +string[] Books =Newstring[]{ -"YangJing", +"Yangsen", A"Yanghua", at     }; -      - @Override -     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); - Setcontentview (r.layout.main); in         //creates a arrayadapter, encapsulates an array -arrayadapter<string> arr =NewArrayadapter<string> ( This, Android. R.layout.simple_dropdown_item_1line, books); to          +Autocompletetextview Auto =(Autocompletetextview) Findviewbyid (R.id.auto); -                  the Auto.setadapter (arr); *     } $}