Hej (Ny här)!
Jag försöker att använda mig av en extern databas (/data/data/com.example.test/databases/database.db) för att sedan kopiera över informationen från denna till appens.
Jag tror felet ligger under SpeciesDbAdapter, men i så fall vad bör ändras och varför får jag INGET error i LogCat? För fel är det ju bevisligen, då den bara crashar.
Under onCreate i Main-klassen
Kod:
private SpeciesDbAdapter dbHelper;
dbHelper = new SpeciesDbAdapter(this);
try {
dbHelper.createDatabase();
dbHelper.open();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Då kallar jag på detta under SpeciesDbAdapter
Kod:
public class SpeciesDbAdapter extends SQLiteOpenHelper{
public static final String DB_SPECIE_ID = "_id";
public static final String DB_SCF_NAME = "scf_name";
public static final String DB_T_TRANS = "translated";
private static String DB_PATH = "/data/data/com.example.test/databases/";
private static final String DB_NAME = "database.db";
public static String LANGUAGE = Locale.getDefault().getLanguage();
private static SQLiteDatabase mDb;
private static final int DB_VERSION = 12;
private final Context mCtx;
public SpeciesDbAdapter(Context context) {
super(context, DB_NAME, null, DB_VERSION);
this.mCtx = context;
}
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");
}
}
}
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try {
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
}
if(checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException {
//Open your local db as the input stream
InputStream myInput = mCtx.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();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
onCreate(db);
}
//Open the database
public void open() throws SQLException {
String myPath = DB_PATH + DB_NAME;
mDb = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
//Close the connection
public void close() {
if (mDb != null) {
mDb.close();
}
}
public Cursor fetchAllSpecies() {
Cursor mCursor = mDb.rawQuery("select * from species s inner join translations t on s._id=t._id AND t.lang = '"+ LANGUAGE +"'", null);
Log.e("QUERY", "select * from species s inner join translations t on s._id=t._id AND t.lang = '"+ LANGUAGE +"'");
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public Cursor filterSpecies(String inputText) throws SQLException {
Cursor mCursor = null;
if (inputText == null || inputText.length () == 0) {
mCursor = mDb.rawQuery("select * from species s inner join translations t on s._id=t._id AND t.lang = '"+ LANGUAGE +"'", null);
}
else {
mCursor = mDb.rawQuery("select * from species s, translations t WHERE (t.lang = '"+ LANGUAGE +"' AND t.translated LIKE '%"+ inputText +"%') OR s.scf_name LIKE '%"+ inputText + "%'", null);
}
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
}
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