使用AutoCompleteTextView，词典数据保存在小型数据库sqlite中，在res的raw文件夹下，运行改程序会自动复制到手机内置SD卡下。

本地电子词典保存在数据库中，源文件代码在http://download.csdn.net/detail/bq1073100909/8079045

添加对SD卡的读写权限：

package org.dyb.activity;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import android.os.Bundle;import android.text.Editable;import android.text.TextWatcher;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.CursorAdapter;import android.widget.TextView;import android.app.Activity;import android.content.Context;import android.database.Cursor;import android.database.sqlite.SQLiteDatabase;public class MainActivity extends Activity implements OnClickListener,		TextWatcher {	// 定义数据库的存放路径	 private final String DATABASE_PATH = android.os.Environment			 .getExternalStorageDirectory().getAbsolutePath() + "/dictionary";	// 用户输入文本框	private AutoCompleteTextView word;	// 定义数据库的名字	private final String DATABASE_FILENAME = "dictionary.db";	private SQLiteDatabase database;	private Button searchWord;	// 用户显示查询结果	private TextView showResult;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		// 打开数据库		database = openDatabase();		searchWord = (Button) findViewById(R.id.searchWord);		word = (AutoCompleteTextView) findViewById(R.id.word);		// 绑定监听器		searchWord.setOnClickListener(this);		word.addTextChangedListener(this);		showResult = (TextView) findViewById(R.id.result);	}	public class DictionaryAdapter extends CursorAdapter {		private LayoutInflater layoutInflater;		public DictionaryAdapter(Context context, Cursor c, boolean flags) {			super(context, c, flags);			layoutInflater = (LayoutInflater) context					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);		}		@Override		public CharSequence convertToString(Cursor cursor) {			return cursor == null ? "" : cursor.getString(cursor					.getColumnIndex("_id"));		}		// 生成新的选项		@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;		}		// 绑定选项到列表中		@Override		public void bindView(View view, Context context, Cursor cursor) {			setView(view, cursor);		}		// 将单词信息显示到列表中		private void setView(View view, Cursor cursor) {			TextView tvWordItem = (TextView) view;			tvWordItem.setText(cursor.getString(cursor.getColumnIndex("_id")));		}	}	// 打开数据库	private SQLiteDatabase openDatabase() {		try {			// 获得dictionary.db文件的绝对路径			String databaseFilename = DATABASE_PATH + "/" + DATABASE_FILENAME;			File dir = new File(DATABASE_PATH);			// 如果目录不存在，则创建这个目录			if (!dir.exists()) {				dir.mkdir();			}			// 如果在/sdcard/dictionary目录中不存在			// dictionary.db文件，则从res\raw目录中复制这个文件到			// SD卡的目录（/sdcard/dictionary）			if (!(new File(databaseFilename)).exists()) {				// 获得封装dictionary.db文件的InputStream对象				InputStream is = getResources().openRawResource(						R.raw.dictionary);				FileOutputStream fos = new FileOutputStream(databaseFilename);				byte[] buffer = new byte[8192];				int count = 0;				// 开始复制dictionary.db文件				while ((count = is.read(buffer)) > 0) {					fos.write(buffer, 0, count);				}				// 关闭文件流				fos.close();				is.close();			}			// 打开/sdcard/dictionary目录中的dictionary.db文件			SQLiteDatabase database = SQLiteDatabase.openOrCreateDatabase(					databaseFilename, null);			return database;		} catch (Exception e) {			e.printStackTrace();		}		return null;	}	@Override	public void onClick(View v) {		// 查询指定的单词		String sql = "select chinese from t_words where english=?";		Cursor cursor = database.rawQuery(sql, new String[] { word.getText()				.toString() });		String result = "未找到该单词.";		// 如果查找单词，显示其中文的意思		if (cursor.getCount() > 0) {			// 必须使用moveToFirst方法将记录指针移动到第1条记录的位置			cursor.moveToFirst();			result = cursor.getString(cursor.getColumnIndex("chinese"))					.replace("&", "&");		}		// 将结果显示到TextView中		showResult.setText(word.getText() + "\n" + result.toString());	}	@Override	public void beforeTextChanged(CharSequence s, int start, int count,			int after) {	}	@Override	public void onTextChanged(CharSequence s, int start, int before, int count) {	}	@Override	public void afterTextChanged(Editable s) {		// 必须将english字段的别名设为_id		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);		// 绑定适配器		word.setAdapter(dictionaryAdapter);	}}

activity_main.xml

    
        
         
              
                  
               
      		
              
                  
         
         
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      字典
         
     
      Settings
         
     
      Hello world!
     	
     
      搜索
     	
     
      查询结果