自動完成文本視圖(AutoCompleteTextView)

AutoCompleteTextView是EditText的一個子類, 是一個提供自動完成建議的文本視圖, 該建議的名單是顯示在一個下拉菜單, 用戶可以從中選擇一個項目以取代其內容.



main.xml

<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<AutoCompleteTextView android:id="@+id/myautocomplete"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:completionThreshold="1"
 />
</LinearLayout>

AndroidAutoCompleteTextView.java

package com.AndroidAutoCompleteTextView;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class AndroidAutoCompleteTextView extends Activity implements TextWatcher{
 
 AutoCompleteTextView myAutoComplete;
 String item[]={
   "January", "February", "March", "April",
   "May", "June", "July", "August",
   "September", "October", "November", "December"
 };
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myAutoComplete = (AutoCompleteTextView)findViewById(R.id.myautocomplete);
        
        myAutoComplete.addTextChangedListener(this);
        myAutoComplete.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, item));
        
    }

 @Override
 public void afterTextChanged(Editable arg0) {
  // TODO Auto-generated method stub
  
 }

 @Override
 public void beforeTextChanged(CharSequence s, int start, int count,
   int after) {
  // TODO Auto-generated method stub
  
 }

 @Override
 public void onTextChanged(CharSequence s, int start, int before, int count) {
  // TODO Auto-generated method stub

 }
}