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POUnable to copy SQLite database from assests folder to device memory
 

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    <p>I'm Unable to copy SQLite database from assests folder to device memory(trying on emulator).</p> <p>I have a database in my project's assests folder which has a table containing 1000s of <strong>pre-existing rows</strong>.</p> <p>I intend to copy the existing file from the assets folder into the database folder of emulator.</p> <p><strong>Piece of ACTIVITY</strong></p> <pre><code> @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //All views(list,textboxes) are declared. try { dbM = new DbManager(this); dbM.checkDataBase(); try { dbM.createDataBase(); } catch (Exception e) { throw new Error(" *** ERROR in DB Access *** " + e.getMessage()); } dbM.openDB(); symbolarr = dbM.getSymbol(); lv.setAdapter(new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, symbolarr)); } catch (Exception e) { throw new Error(" *** ERROR in onCreate *** " + e.getMessage()); } finally { dbM.close(); } } </code></pre> <p><strong>Piece of code from my DbManager class:</strong></p> <pre><code> public boolean checkDataBase() { String myPath = DATABASE_PATH + DATABASE_NAME; File f = new File(myPath); return f.exists(); } public void createDataBase() { try { InputStream myInput = ctx.getAssets().open(DATABASE_NAME); OutputStream myOutput = new FileOutputStream(DATABASE_PATH + DATABASE_NAME); byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer)) &gt; 0) { myOutput.write(buffer, 0, length); } myOutput.flush(); myOutput.close(); myInput.close(); } catch (FileNotFoundException e) { throw new Error("file not found -- " + e.getMessage()); } catch (IOException e) { throw new Error("io exception " + e.getMessage()); } catch (Exception e) { throw new Error(" exception " + e.getMessage()); } } public DbManager openDB() throws SQLException { dbmgr = new DbManager(ctx); mDb = dbmgr.getWritableDatabase(); return this; } public String[] getSymbol() { Cursor cur; try { cur = mDb.rawQuery("select symbol,company_name from Scrip", null); } catch (SQLiteException e) { throw new Error(" *** ERROR in cursor *** " + e.getMessage()); } String[] b1 = new String[1326]; int x = 0; if (cur.moveToFirst()) { do { b1[x] = cur.getString(cur.getColumnIndex("symbol")); x++; } while (cur.moveToNext()); } cur.close(); return b1; } </code></pre> <p><strong>LOGCAT</strong></p> <pre><code> FATAL EXCEPTION: main java.lang.Error: file not found -- AndroidDB.db at com.dbexample.DbManager.createDataBase(DbManager.java:113) at com.dbexample.DataAttach.onCreate(DataAttach.java:83) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) at android.app.ActivityThread.access$600(ActivityThread.java:122) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4340) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) </code></pre> <h2>NOTE</h2> <p>1: Changing buffer size doesn't help..</p> <p>2: There is a file named AndroidDB.db with size 62kb in my assets folder..</p> <p>3: both the database names(in my assets folder and in my code) are same and I have android_metadata table in my DB which is in assets folder..</p> <p><strong>4: When I was not using <em></strong><code>createDataBase()</code><strong></em>, Database was getting created but my desired table i.e.Scrip was not getting copied. So when I tried to fetch the data from table, I was getting an exception that <code>no such table Scrip</code>.... That means I need to copy <code>Scrip</code> table from assets folder to database present on emulator memory. When I try to do the same using <code>createDataBase()</code>,I'm getting nullPointerException</strong></p> <p>5.: When I tried following code in createDatabase()</p> <pre><code>AssetManager assetManager = ctx.getAssets(); String[] files = assetManager.list("Files"); for (int i = 0; i &lt; files.length; i++) { str[i] = "\n=" + " file=" + " :" + i + "=" + " name=" + "&gt; " + files[i]; } Log.v("len=", "" + files.length); </code></pre> <p>Then files.length is equal to <code>0</code>. That simply means <strong>It is unable to detect any files inside the assets folder.</strong></p> <p><em><strong>ANY HELP WILL BE LIFE-SAVER !!!</em></strong></p>
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    1. COWhat about the size of the db file? Is there is any file created in `/data/data/com.dbexample/databases/` folder?
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    2. COIs that size same as db file in asset folder?
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    3. COu can get it from [here](http://www.mediafire.com/?413ylnl79t0ip2q)
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