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POCopy Sqlite database for android application
 

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    <p>I am trying to use my own created database in my android application using this tutorial <a href="http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/" rel="nofollow">http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/</a></p> <p>I have my database in my assets folder have been working for 5 hours to get the work around but in vain.. i always keep getting</p> <pre><code>01-17 04:09:07.111: E/Database(1060): sqlite3_open_v2("/data/data/com.rahul.besttracker/databases/route", &amp;handle, 1, NULL) failed </code></pre> <p>and </p> <pre><code>01-17 04:09:07.271: E/AndroidRuntime(1060): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rahul.besttracker/com.rahul.besttracker.Busdisplay}: android.database.sqlite.SQLiteException: unable to open database file </code></pre> <p>my code</p> <pre><code> public class Busdisplay extends ListActivity { TextView source, destination; String src, dest; ArrayList&lt;String&gt; mArrayList; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); init(); Bundle caught = getIntent().getExtras(); src = caught.getString("source"); dest = caught.getString("dest"); DataBaseHelper entry = null; entry = new DataBaseHelper(Busdisplay.this); entry.openDataBase(); mArrayList = entry.readEntry(src, dest); entry.close(); setListAdapter(new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, mArrayList)); } @Override protected void onListItemClick(ListView l, View v, int position, long id) { // TODO Auto-generated method stub super.onListItemClick(l, v, position, id); } void init() { source = (TextView) findViewById(R.id.textView1); destination = (TextView) findViewById(R.id.textView2); } } </code></pre> <p>My DBhelper class</p> <pre><code> public class DataBaseHelper extends SQLiteOpenHelper { // The Android's default system path of your application database. private static final String DB_PATH = "/data/data/com.rahul.besttracker/databases/"; private static final String DB_NAME = "route.db"; private static final String DB_TABLE1 = "route1"; private static final String DB_TABLE2 = "route2"; 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) { System.out.print("ERROR"); } 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)) &gt; 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) { try { createDataBase(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE1); db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE2); onCreate(db); } public ArrayList&lt;String&gt; readEntry(String src, String dest) { // TODO Auto-generated method stub Cursor c = myDataBase.rawQuery("SELECT route_no from " + DB_TABLE1 + " WHERE stops LIKE '%" + src + "%,%" + dest + "%';", null); ArrayList&lt;String&gt; mArrayList = new ArrayList&lt;String&gt;(); int index = c.getColumnIndex("route_no"); for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { // The Cursor is now set to the right position mArrayList.add(c.getString(index)); } return mArrayList; } // 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. } </code></pre>
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    1. This table or related slice is empty.
    1. USRahul Mehrotra
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    1. COConsider using SQLiteAssetHelper (https://github.com/jgilfelt/android-sqlite-asset-helper), which implements the pattern you are trying to follow and saves you from having to write your own code for it.
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      1. POCopy Sqlite database for android application
      1. USCommonsWare
    2. COtried it still getting 01-17 04:09:07.111: E/Database(1060): sqlite3_open_v2("/data/data/com.rahul.besttracker/databases/route", &handle, 1, NULL) failed...same error
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      1. POCopy Sqlite database for android application
      1. USRahul Mehrotra
    3. COthis one worked..thanks bro...
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      1. USRahul Mehrotra
 

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