Android Development Learning notes (9) Android Application Interface Programming autocompletetextview Learning

Autocompletetextview is an automatic text box inherited from edittext.

Important attributes:

Android: completionhint

Android: completionthreshold

The test application contains only one simple text box. After a character is entered, the matching string is displayed in the drop-down menu.

When using autocompletetextview, you must match an adapter to provide the content displayed in the drop-down menu.

Final effect:

Program code:

Layout file:

<RelativeLayout 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"    tools:context=".MainActivity" >    <AutoCompleteTextView        android:id="@+id/txt"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:hint="Type some characters"        android:completionThreshold="1"        android:popupBackground="#cccccc" /></RelativeLayout>

Java file:

package com.xujin.autocompletetextviewtest;import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;public class MainActivity extends Activity {String [] chars = new String[]{"Andy", "Angel Girl","Andrea", "Air Traffic","Akon",  "Alan Jackson", "Alison Krauss", "Alizee",};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ArrayAdapter<String> aa = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, chars);AutoCompleteTextView ac =(AutoCompleteTextView)findViewById(R.id.txt);ac.setAdapter(aa);}}