<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <AutoCompleteTextView  android:id="@+id/myAutoCompleteTextView"  android:layout_width="fill_parent"  android:layout_height="wrap_content" /></LinearLayout>

package com.example.sample_5_1;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;public class AutoCompleteActivity extends AppCompatActivity { private static final String[] myStr = new String[]{   "vae","victory","vision","virtue","vital" }; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_auto_complete);  ArrayAdapter<String> aa = new ArrayAdapter<String>( //創建適配器    this,           // Context    android.R.layout.simple_dropdown_item_1line,    //使用Android自帶的簡單布局    myStr);          //資源數組  AutoCompleteTextView myAutoCompleteTextView =    (AutoCompleteTextView) findViewById(R.id.myAutoCompleteTextView);     //得到控件的引用  myAutoCompleteTextView.setAdapter(aa); //設置適配器  myAutoCompleteTextView.setThreshold(1); //定義需要用戶輸入的字符數 }}