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POHow to use existing sql lite data base its size is 2.3 Mb in my android application
 

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  1. POHow to use existing sql lite data base its size is 2.3 Mb in my android application
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    <p>I am working on android application.My client provides me a data base which is some what large .It is almost 2.3Mb. Initially i don't know how to use existing data base i followed this tutorial <a href="http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/" rel="nofollow">tutorial</a></p> <p>for accessing the existing database.But i got error.Here i am wondering how to access this type of large database . Can any one help me.</p> <p>Here i have my DataBaseHelper class.</p> <p>public class DataBaseHelper extends SQLiteOpenHelper {</p> <pre><code>// The Android's default system path of your application database. private static String DB_PATH = "/data/data/com.example.readdatabase/databases/"; private static String DB_NAME = "categories.sqlite"; private SQLiteDatabase myDataBase; private final Context myContext; public DataBaseHelper(Context context) { super(context, DB_NAME, null, 1); this.myContext = context; } public void createDataBase() throws IOException { boolean dbExist = checkDataBase(); if (dbExist) { // do nothing - database already exist } else { 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)) &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) { } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } public Cursor performTransaction(String query) { Cursor cur = myDataBase.rawQuery(query, null); return cur; } </code></pre> <p>}</p> <p>Here is my main class</p> <p>public class MainActivity extends Activity {</p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); DataBaseHelper db = new DataBaseHelper(this); try { db.createDataBase(); } catch (IOException e) { e.printStackTrace(); } db.openDataBase(); String query = "select * from PrayerInfo"; Cursor cursor = db.performTransaction(query); System.out.println(cursor.getColumnCount()); } </code></pre> <p>}</p> <p>It works fine in Android 2.3 and higher versions .but it does not work on lower versions .I got the error like.can any one help me</p> <p>java.lang.Error: Error copying database at com.example.readdatabase.DataBaseHelper.createDataBase(DataBaseHelper.java:48) at com.example.readdatabase.MainActivity.onCreate(MainActivity.java:18)</p>
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    1. USPrudhvi Reddy
    1. USPrudhvi Reddy
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      1. USPrudhvi Reddy
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    1. COhere iam faceing same issue give me some sugession..
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