有一個很好的解決方案，這here。
- 正在準備SQLite數據庫文件。
假設你已經創建了你的sqlite數據庫，我們需要對它進行一些修改。 如果您沒有sqlite管理員，我建議您下載適用於Win/Linux/Mac的開源SQLite數據庫瀏覽器。
打開數據庫，添加一個名爲「新表格android_metadata」，您可以執行以下SQL語句來做到這一點：
CREATE TABLE "android_metadata" ("locale" TEXT DEFAULT 'en_US')
在「android_metadata現在，插入一個單行文本「EN_US」 「表：
INSERT INTO "android_metadata" VALUES ('en_US')
然後，有必要重命名錶的主id字段爲‘_id’因此Android會知道你的表的id字段綁定。 通過按編輯表格按鈕編輯表格，然後選擇要編輯的表格並最終選擇要重命名的字段，可以輕鬆地在SQLite數據庫瀏覽器中執行此操作。
將所有數據表的id字段重命名爲「_id」並添加「android_metadata」表後，您的數據庫就可以在您的Android應用程序中使用了。
注意：在這個圖片，我們看到表「類別」和「內容」與重命名爲「_id」的id字段和剛剛添加表「android_metadata」。
- 在您的Android 應用程序中複製，打開並訪問您的數據庫。
現在只需將您的數據庫文件放在項目的「assets」文件夾中，並通過從「android.database.sqlite」包中擴展SQLiteOpenHelper類來創建Database Helper類。
讓您DataBaseHelper類是這樣的：
public class DataBaseHelper extends SQLiteOpenHelper{
//The Android's default system path of your application database.
private static String DB_PATH = "/data/data/YOUR_PACKAGE/databases/";
private static String DB_NAME = "myDBName";
private SQLiteDatabase myDataBase;
private final Context myContext;
/**
* Constructor
* Takes and keeps a reference of the passed context in order to access to the application assets and resources.
* @param context
*/
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
/**
* Creates a empty database on the system and rewrites it with your own database.
* */
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
if(dbExist){
//do nothing - database already exist
}else{
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each time you open the application.
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
/**
* Copies your database from your local assets-folder to the just created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Open the database
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
// Add your public helper methods to access and get content from the database.
// You could return cursors by doing "return myDataBase.query(....)" so it'd be easy
// to you to create adapters for your views.
}
就是這樣。 現在您可以創建此DataBaseHelper類的新實例，並調用createDataBase（）和openDataBase（）方法。請記住在DB_PATH字符串中將「YOUR_PACKAGE」更改爲應用程序包名稱空間（即：com.examplename.myapp）。
...
DataBaseHelper myDbHelper = new DataBaseHelper();
myDbHelper = new DataBaseHelper(this);
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
}catch(SQLException sqle){
throw sqle;
}
...
and ...？我在這裏看不到問題或問題 – njzk2 2012-02-10 15:54:54