在輸入框中輸入我們想要輸入的資訊就會出現其他與其相關的提示資訊，這種效果在Android中是用AutoCompleteTextView實現的

主要實現程式碼

MainActivity

package com.example.happydictionary;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;

import com.example.happydictionary.adapter.DictionaryAdapter;
import com.example.happydictionary.db.DBHelper;

import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener,
		TextWatcher {
	private DBHelper dbHelper; // 使用者輸入文字框
	private AutoCompleteTextView word; // 定義資料庫的名字
	private SQLiteDatabase database;
	private Button searchWord; // 搜尋按鈕
	private TextView showResult; // 使用者顯示查詢結果

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		dbHelper = new DBHelper(getBaseContext());// 開啟資料庫
		database = dbHelper.openDatabase();

		init();

		searchWord.setOnClickListener(this); // 繫結監聽器
		word.addTextChangedListener(this); // 繫結文字改變監聽器

	}

	public void init() {
		searchWord = (Button) findViewById(R.id.btnSearch);
		word = (AutoCompleteTextView) findViewById(R.id.etWord);
		showResult = (TextView) findViewById(R.id.tvSearchResult);

	}

	public void afterTextChanged(Editable s) {
		Cursor cursor = database.rawQuery(
				"select english as _id from t_words where english like ?",
				new String[] { s.toString() + "%" });
		
		// 新建新的Adapter
		DictionaryAdapter dictionaryAdapter = new DictionaryAdapter(this,cursor, true);
		
		// 繫結介面卡
		word.setAdapter(dictionaryAdapter);

	}

	public void beforeTextChanged(CharSequence s, int start, int count,
			int after) {

	}

	public void onTextChanged(CharSequence s, int start, int before, int count) {

	}

	public void onClick(View view) {
		// 查詢指定的單詞
		String sql = "select chinese from t_words where english=?";
		
		Cursor cursor = database.rawQuery(sql, new String[] { word.getText()
				.toString() });
		
		String result = "查無該詞"; // 如果查詢單詞，顯示其中文的意思
		
		if (cursor.getCount() > 0) { 
			
			cursor.moveToFirst(); // 須使用moveToFirst方法將記錄指標移動到第1條記錄的位置
			result = cursor.getString(cursor.getColumnIndex("chinese"))
					.replace("&", "&");
		}

		showResult.setText(word.getText() + "\n" + result.toString());// 將結果顯示到TextView中
	}

}
 

package com.example.happydictionary.adapter;

import com.example.happydictionary.R;

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.TextView;

//自定義Adapter類
public class DictionaryAdapter extends CursorAdapter {
	private LayoutInflater layoutInflater;

	@Override
	public CharSequence convertToString(Cursor cursor) {
		return cursor == null ? "" : cursor.getString(cursor
				.getColumnIndex("_id"));
	}

	// 將單詞資訊顯示到列表中
	private void setView(View view, Cursor cursor) {
		TextView tvWordItem = (TextView) view;
		tvWordItem.setText(cursor.getString(cursor.getColumnIndex("_id")));
	}

	// 繫結選項到列表中
	@Override
	public void bindView(View view, Context context, Cursor cursor) {
		setView(view, cursor);
	}

	// 生成新的選項
	@Override
	public View newView(Context context, Cursor cursor, ViewGroup parent) {
		View view = layoutInflater.inflate(R.layout.word_list_item, null);
		setView(view, cursor);
		return view;
	}

	public DictionaryAdapter(Context context, Cursor c, boolean autoRequery) {
		super(context, c, autoRequery);
		layoutInflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	}
}
 

package com.example.happydictionary.dao;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.example.happydictionary.db.DBHelper;

public class WordDao {
	 private DBHelper dbHelper;
	 private SQLiteDatabase sqLiteDatabase;
	 public WordDao(Context context){
		 dbHelper=new DBHelper(context);
	 }
     public String getChinese(String english){
    	 sqLiteDatabase=dbHelper.openDatabase();
    	 String sql="select chinese from t_words where english=?";
    	 Cursor cursor=sqLiteDatabase.rawQuery(sql, new String[]{english});
    	 String chinese="查無該詞";
    	 if(cursor.moveToFirst()){
    		 chinese=cursor.getString(cursor.getColumnIndex("chinese"));
    	 }
    	 return chinese;
     }
}
 

package com.example.happydictionary.db;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.example.happydictionary.R;
import com.example.happydictionary.R.raw;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Environment;
import android.util.Log;

/**
 * 實現將資料庫檔案從raw目錄拷貝到手機裡存放資料庫的位置
 * 
 * @author cabbage
 */
public class DBHelper {
	private final int BUFFER_SIZE = 400000;
	public static final String DB_NAME = "idiom.db"; // 儲存的資料庫檔名
	public static final String PACKAGE_NAME = "com.example.happydictionary";// 應用的包名
	public static final String DB_PATH = "/data"
			+ Environment.getDataDirectory().getAbsolutePath() + "/"
			+ PACKAGE_NAME + "/databases";
	/*// SDCard 定義資料庫的存放路徑
	private final String DATABASE_PATH = android.os.Environment
			.getExternalStorageDirectory().getAbsolutePath() + "/dictionary";*/

	private Context context;

	public DBHelper(Context context) {
		this.context = context;
	}

	public SQLiteDatabase openDatabase() {
		try {
			File myDataPath = new File(DB_PATH);
			if (!myDataPath.exists()) {
				myDataPath.mkdirs();// 如果沒有這個目錄則建立
			}
			String dbfile = myDataPath + "/" + DB_NAME;
			if (!(new File(dbfile).exists())) {// 判斷資料庫檔案是否存在，若不存在則執行匯入，否則直接開啟資料庫
				InputStream is = context.getResources().openRawResource(
						R.raw.dictionary); // 欲匯入的資料庫
				FileOutputStream fos = new FileOutputStream(dbfile);
				byte[] buffer = new byte[BUFFER_SIZE];
				int count = 0;
				while ((count = is.read(buffer)) > 0) {
					fos.write(buffer, 0, count);
				}
				fos.close();
				is.close();
			}
			SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbfile,
					null);
			return db;
		} catch (FileNotFoundException e) {
			Log.e("Database", "File not found");
			e.printStackTrace();
		} catch (IOException e) {
			Log.e("Database", "IO exception");
			e.printStackTrace();
		}
		return null;
	}
}

package com.example.happydictionary.entity;

public class Word {
	private String english;
	private String chinese;

	public String getEnglish() {
		return english;
	}

	public void setEnglish(String english) {
		this.english = english;
	}

	public String getChinese() {
		return chinese;
	}

	public void setChinese(String chinese) {
		this.chinese = chinese;
	}

}

<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"
    android:background="@drawable/mainbg"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >


    <Button
        android:id="@+id/btnSearch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/etWord"
        android:layout_alignBottom="@+id/etWord"
        android:layout_marginLeft="16dp"
        android:layout_toRightOf="@+id/etWord"
        android:background="@drawable/ibsearchword"
        android:onClick="searchWord"
        android:text="@string/serachWord" />

    <TextView
        android:id="@+id/tvSearchResult"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignLeft="@+id/etWord"
        android:layout_below="@+id/etWord"
        android:layout_marginTop="22dp"
        android:textSize="25sp"
        android:background="@drawable/bg_roundcorner"
        android:textAppearance="?android:attr/textAppearanceMedium" />

       <AutoCompleteTextView
        android:id="@+id/etWord"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="31dp"
        android:background="@android:drawable/edit_text"
        android:ems="10"
        android:hint="@string/searchHint"
        android:singleLine="true"
        android:textColor="#552006"
        android:textColorHint="#782f10" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tvWordItem"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:paddingLeft="6dip"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="@color/gray" />