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POCopy my own SQLite DB from Asset folder to
 

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    <p>I don't understand why I'm not able to copy my db file (abic_) to the application directory ("/data/data/" + context.getPackageName() + "/databases")</p> <p>This is my DataBaseHelper class:</p> <pre><code> import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.io.IOException;import java.io.OutputStream; import android.content.Context; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteException; import android.database.sqlite.SQLiteOpenHelper; public class DataBaseHelper extends SQLiteOpenHelper{ //The Android's default system path of your application database. private String DB_PATH; private static String DB_NAME = "abic_"; private static final Integer DB_VERSION = 1; private SQLiteDatabase mydb; 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, DB_VERSION); this.myContext = context; DB_PATH = "/data/data/" + context.getPackageName() + "/databases"; } @Override public void onCreate(SQLiteDatabase db) {; } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } public void apriDatabase() throws SQLException { try { String percorso = DB_PATH + DB_NAME; mydb = SQLiteDatabase.openDatabase(percorso, null, SQLiteDatabase.OPEN_READONLY); } catch (Exception e) { e.printStackTrace(); } } 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) { e.printStackTrace(); } } } 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; // if the path doesn't exist first, create it File f = new File(outFileName); if (!f.exists()){ f.mkdir(); f.createNewFile(); } //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(); } private boolean checkDataBase(){ SQLiteDatabase checkDB = null; try{ String myPath = DB_PATH + DB_NAME; checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE); }catch(SQLiteException e){ //database does't exist yet. } if(checkDB != null){ checkDB.close(); } return checkDB != null ? true : false; } @Override public synchronized void close() { if(mydb != null) mydb.close(); super.close(); } }</code></pre> <p>This is the listview that uses this class:</p> <pre><code> import android.app.ListActivity; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; public class abicabList extends ListActivity { protected EditText searchText; protected SQLiteDatabase mydb; protected Cursor cursor; protected ListAdapter adapter; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mydb = (new DataBaseHelper(this)).getWritableDatabase(); searchText = (EditText) findViewById (R.id.searchText); } public void search(View view) { String text = searchText.getText().toString(); String cap = "CAP"; // || is the concatenation operation in SQLite if (text.length()14) { cursor = mydb.rawQuery("SELECT _id, ABI, BANCA, CAB, CAP, Filiale, City FROM abicab WHERE ABI || CAB LIKE ? LIMIT 30", new String[]{"%" + searchText.getText().toString().substring(6,10) + "%" + searchText.getText().toString().substring(11,15) + "%"}); adapter = new SimpleCursorAdapter( this, R.layout.abicab_list_item, cursor, new String[] {"BANCA", "Filiale", "City", "CAP"}, new int[] {R.id.BANCA, R.id.Filiale, R.id.City ,R.id.CAP}); setListAdapter(adapter); } } </code></pre> <p>So when I run the application the db is created in the folder but it doesn't contain the table that is in the db I have in asset folder (see the picture [1]: <a href="http://i.stack.imgur.com/AaFj8.jpg">http://i.stack.imgur.com/AaFj8.jpg</a>). Thanks in advance for your help.</p>
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