당신은 설치된 응용 프로그램에 자산 폴더에서 DB 파일을 복사해야합니다.
public class DatabaseOpenHelper extends SQLiteOpenHelper {
private final static String DB_NAME = "YourDatabaseFile.sqlite";
private static String DB_PATH = "/data/data/%s/databases/";
private final String ERROR_TAG = "error";
private final static int DB_VERSION = 1;
private final int BUFFER_SIZE = 8 * 1024;
private SQLiteDatabase databaseHandle;
private final Context context;
public DatabaseOpenHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
this.context = context;
DB_PATH = String.format(DB_PATH, context.getPackageName());
}
public SQLiteDatabase openDataBase() {
try {
String databasePath = DB_PATH + DB_NAME;
if (databaseHandle == null) {
createDataBase();
databaseHandle = SQLiteDatabase.openDatabase(databasePath, null, SQLiteDatabase.OPEN_READWRITE);
}
}
catch (SQLiteException e) {
throw new IllegalStateException(context.getResources().getString(R.string.err_opening_db), e);
}
return databaseHandle;
}
private boolean createDataBase() {
try {
if (!isDataBase()) {
this.getReadableDatabase();
copyDataBase();
return true;
}
}
catch (SQLiteException e) {
throw new IllegalStateException(context.getResources().getString(R.string.err_opening_db), e);
}
catch (IOException e){
Log.e(ERROR_TAG, context.getResources().getString(R.string.err_close_stream), e);
}
return false;
}
public boolean isDataBase() {
SQLiteDatabase verifiableDatabase = null;
try {
String databasePath = DB_PATH + DB_NAME;
verifiableDatabase = SQLiteDatabase.openDatabase(databasePath, null, SQLiteDatabase.OPEN_READONLY);
verifiableDatabase.close();
}
catch (SQLiteException e) {
Log.e(ERROR_TAG, context.getResources().getString(R.string.err_opening_db), e);
return false;
}
return true;
}
private void copyDataBase() throws IOException {
InputStream externalDbStream = null;
OutputStream localDbStream = null;
try {
externalDbStream = context.getAssets().open(DB_NAME);
localDbStream = new FileOutputStream(DB_PATH+DB_NAME);
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead;
while ((bytesRead = externalDbStream.read(buffer)) > 0) {
localDbStream.write(buffer, 0, bytesRead);
}
}
catch (IOException e) {
throw new IllegalStateException(context.getResources().getString(R.string.err_copying_db), e);
}
finally {
if (localDbStream != null)
localDbStream.close();
if (externalDbStream != null)
externalDbStream.close();
}
}
@Override
public void close() {
databaseHandle.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}}
사용 : 예를 들어
DatabaseOpenHelper dbHelper = new DatabaseOpenHelper(context);
SQLiteDatabase database = dbHelper.openDataBase();
그냥 생각
:이 파일을 구문 분석하는 것이 더하지 않을까요 (JSON/XML을/무엇이든 ..) 응용 프로그램은 첫째 응용 프로그램의 내부에 시작할 때 데이터 베이스? 자산 파일이 데이터베이스 파일이어야합니까? – iBecar