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POAndroid SQLite DataBase doesn't work on versions newer than Android 2.1
 

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  1. POAndroid SQLite DataBase doesn't work on versions newer than Android 2.1
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    <p>I'm currently working on an android application that contains SQLite database.. I was trying on emulator with Android 2.1 and it works fine .. but it doesn't work on version newer than Android 2.1 .... In my app, I created an external SQLite database on SQLite manager, then i copy this DB to "/data/data/" + getPackageName() + "/databases/MyDB" when the application is started for the first time .<br> Code for copying the DB from assets folder : </p> <pre><code>try{ try { String destPath = "/data/data/" + getPackageName() + "/databases/MyDB"; File f = new File(destPath); if (!f.exists()) { CopyDB( getBaseContext().getAssets().open("mydb"), new FileOutputStream(destPath)); } } catch (FileNotFoundException e) { e.printStackTrace(); </code></pre> <p>copyDB function :</p> <pre><code>public void CopyDB(InputStream inputStream, OutputStream outputStream) throws IOException { //---copy 1K bytes at a time--- byte[] buffer = new byte[1024]; int length; while ((length = inputStream.read(buffer)) &gt; 0) { outputStream.write(buffer, 0, length); } outputStream.flush(); inputStream.close(); outputStream.close(); } </code></pre> <p>DBAdapter Class :</p> <pre><code>public class DBAdapter { public static final String KEY_ROWID = "_id"; public static final String KEY_NAME = "username"; public static final String KEY_PASSWORD = "password"; private static final String DATABASE_NAME = "MyDB"; private static final String DATABASE_TABLE = "users"; private static final int DATABASE_VERSION = 3; private final Context context; private DatabaseHelper DBHelper; private SQLiteDatabase db; public DBAdapter(Context ctx) { this.context = ctx; DBHelper = new DatabaseHelper(context); } private static class DatabaseHelper extends SQLiteOpenHelper { DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } } //---opens the database--- public DBAdapter open() throws SQLException { db = DBHelper.getWritableDatabase(); return this; } //---closes the database--- public void close() { DBHelper.close(); } //---retrieves all the users--- public Cursor getAllusers() { return db.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_NAME, KEY_PASSWORD}, null, null, null, null, null); } //---retrieves a particular user--- public User getuser(String username) throws SQLException { Cursor mCursor = db.query(true, DATABASE_TABLE, new String[] {KEY_ROWID, KEY_NAME, KEY_PASSWORD}, KEY_NAME + "=" + "'"+username+ "'", null, null, null, null, null); if(mCursor.moveToFirst()) { mCursor.moveToFirst(); User u=new User(Integer.valueOf(mCursor.getString(0)),mCursor.getString(1),mCursor.getString(2)); return u; }else return null; } public List&lt;Device&gt; getNotupdatedDevices() { List&lt;Device&gt; Devices = new ArrayList&lt;Device&gt;(); SQLiteDatabase db = DBHelper.getWritableDatabase(); Cursor myCursor = db.query("Devices", new String[] {"_DeviceID","current_state","current_level","current_CD_Channel" }, "updated=?", new String[] {"false"}, null, null, null); if (myCursor.moveToFirst()) { do { Device d = new Device(Integer.valueOf(myCursor.getString(0)), myCursor.getString(1),Integer.valueOf(myCursor.getString(2)), Float.valueOf(myCursor.getString(3))); Devices.add(d); } while (myCursor.moveToNext()); return Devices; } return null; } public Device getDevice(String DeviceType,String RoomType,int floor) throws SQLException { Cursor mCursor = db.query("Rooms", new String[] {"_RoomID" }, "RoomType=? AND floor=?", new String[] {RoomType, floor+""}, null, null, null); if(mCursor.moveToFirst()) { mCursor.moveToFirst(); int id=Integer.valueOf(mCursor.getString(0)); Cursor myCursor = db.query("Devices", new String[] {"current_state","current_level","current_CD_Channel" }, "DeviceType=? AND RoomID=?", new String[] {DeviceType, id+""}, null, null, null); if(myCursor.moveToFirst()) { myCursor.moveToFirst(); Device d=new Device(DeviceType,floor,RoomType,myCursor.getString(0), Integer.valueOf(myCursor.getString(1)),Float.valueOf(myCursor.getString(2))); return d; }else return null; }else return null; } public void updateDevice(int floor, String RoomType, String DeviceType, String current_state,int current_level,float current_CD_Channel ) { SQLiteDatabase db = DBHelper.getWritableDatabase(); Cursor mCursor = db.query("Rooms", new String[] {"_RoomID" }, "RoomType=? AND floor=?", new String[] {RoomType, floor+""}, null, null, null); mCursor.moveToFirst(); int id=Integer.valueOf(mCursor.getString(0)); ContentValues values = new ContentValues(); values.put("current_state", current_state); values.put("current_level", current_level); values.put("current_CD_Channel", current_CD_Channel); values.put("updated", "false"); db.update("Devices", values, "RoomID= ? AND DeviceType=?",new String[] { String.valueOf(id),DeviceType }); db.close(); } public void SyncDevice(int id, String current_state,int current_level,float current_CD_Channel ) { SQLiteDatabase db = DBHelper.getWritableDatabase(); ContentValues values = new ContentValues(); values.put("current_state", current_state); values.put("current_level", current_level); values.put("current_CD_Channel", current_CD_Channel); values.put("updated", "true"); // updating row db.update("Devices", values, "_DeviceID= ?", new String[] { String.valueOf(id) }); db.close(); } </code></pre> <p>}</p> <p>logcat message when running the app on ice-cream sandwich emulator :</p> <pre><code> 06-26 22:59:29.418: E/AndroidRuntime(6230): FATAL EXCEPTION: main 06-26 22:59:29.418: E/AndroidRuntime(6230): android.database.sqlite.SQLiteException: no such table: users: , while compiling: SELECT DISTINCT _id, username, password FROM users WHERE username='aya' 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteCompiledSql.&lt;init&gt;(SQLiteCompiledSql.java:68) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteProgram.&lt;init&gt;(SQLiteProgram.java:127) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteProgram.&lt;init&gt;(SQLiteProgram.java:94) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteQuery.&lt;init&gt;(SQLiteQuery.java:53) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1449) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1405) 06-26 22:59:29.418: E/AndroidRuntime(6230): at cse.HomeAutomation.DBAdapter.getuser(DBAdapter.java:79) 06-26 22:59:29.418: E/AndroidRuntime(6230): at cse.HomeAutomation.Login$1.onClick(Login.java:53) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.view.View.performClick(View.java:3511) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.view.View$PerformClick.run(View.java:14105) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.os.Handler.handleCallback(Handler.java:605) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.os.Handler.dispatchMessage(Handler.java:92) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.os.Looper.loop(Looper.java:137) 06-26 22:59:29.418: E/AndroidRuntime(6230): at android.app.ActivityThread.main(ActivityThread.java:4424) 06-26 22:59:29.418: E/AndroidRuntime(6230): at java.lang.reflect.Method.invokeNative(Native Method) 06-26 22:59:29.418: E/AndroidRuntime(6230): at java.lang.reflect.Method.invoke(Method.java:511) 06-26 22:59:29.418: E/AndroidRuntime(6230): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 06-26 22:59:29.418: E/AndroidRuntime(6230): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 06-26 22:59:29.418: E/AndroidRuntime(6230): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>I searched a lot but didn't find a solution for this problem ... thank you so much in advance :) </p>
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