Android的AutoCompleteTextView與TextWatcher的結合

AutoCompleteTextView是實現動態匹配輸入內容的一種輸入框（EditText）

如輸入“and”時，會提示“android”

package com.conowen.test;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.AutoCompleteTextView;
public class DrComActivity extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    AutoCompleteTextView autoinput =(AutoCompleteTextView) findViewById(R.id.autoinput);

    autoinput.setThreshold(1);// 輸入一個字母就開始自動提示


autoinput.addTextChangedListener(new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        // TODO Auto-generated method stub
        //s是輸入框正在輸的字符串，隨著不斷的輸入，s的值也會不停地改變


             String str = s.toString();

            String[] temp = getInputAdapter(getInputWorldOrder(str));
              //此處代碼省略，自己通過查詢數據庫或者其他方法，動態地獲取相應的字符串數組
             //如做一個字典時，不可能預先把所有單詞做成一個adapter，應該根據輸入的字符，
            //動態地查詢一定數量的相對應的單詞，然后再構建adapter
             ArrayAdapter<String> adapter = new ArrayAdapter<String>(ct,
             android.R.layout.simple_dropdown_item_1line, temp);


             autoinput.setAdapter(adapter)

             //正在輸入時，構建adapter，然后把adapter綁定在AutoCompleteTextView 上面

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

    }

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

    }

}
}

}</pre>