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POandroid sqlite cursor
 

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  1. POandroid sqlite cursor
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    <p>I got these error when running the application</p> <blockquote> <p>Unable to start activity ComponentInfo{com.rika/com.rika.LatihanActivity}: </p> <p>android.database.StaleDataException: Access closed cursor</p> <p>ERROR/AndroidRuntime(299): Caused by: android.database.StaleDataException: Access closed cursor</p> </blockquote> <p>Is the error happened because of the cursor code?</p> <p><strong>Its the activity class</strong></p> <pre><code>public class LatihanActivity extends Activity{ /** Called when the activity is first created. */ private RadioButton radioButton; private TextView quizQuestion; private int rowIndex = 1; private int questNo=0; private boolean checked=false; private boolean flag=true; private RadioGroup radioGroup; String[] corrAns = new String[5]; final DatabaseHelper db = new DatabaseHelper(this); Cursor c1; Cursor c2; Cursor c3; int counter=1; String label; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); String options[] = new String[19]; // get reference to radio group in layout final RadioGroup radiogroup = (RadioGroup) findViewById(R.id.rdbGp1); // layout params to use when adding each radio button LinearLayout.LayoutParams layoutParams = new RadioGroup.LayoutParams( RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT); try { db.createDataBase(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } c3 = db.getCorrAns(); for(c3.moveToFirst();!c3.isAfterLast(); c3.moveToNext()) { for (int i=0;i&lt;=4;i++) { //... get data from DB corrAns[i]=c3.getString(0);} } //then you can close it c3.close(); /////////////////////////////////////// radioGroup = (RadioGroup) findViewById(R.id.rdbGp1); radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { // TODO Auto-generated method stub for(int i=0; i&lt;radiogroup.getChildCount() ; i++) { RadioButton btn = (RadioButton) radioGroup.getChildAt(i); String text; if (btn.isPressed() &amp;&amp; btn.isChecked() &amp;&amp; questNo &lt; 5) { Log.e("corrAns[questNo]",corrAns[questNo]); if (corrAns[questNo].equals(btn.getText()) &amp;&amp; flag==true) { flag=false; checked = true; } else if(checked==true) { flag=true; checked = false; } } } } }); quizQuestion = (TextView) findViewById(R.id.TextView01); displayQuestion(); /*Saves the selected values in the database on the save button*/ Button btnSave = (Button) findViewById(R.id.btnSave); btnSave.setOnClickListener(btnSave_Listener); } /*Called when save button is clicked*/ private View.OnClickListener btnSave_Listener= new View.OnClickListener() { @Override public void onClick(View v) { } }; private void displayQuestion() { //Fetching data quiz data and incrementing on each click c1=db.getQuiz_Content(rowIndex); c2 =db.getAns(rowIndex++); quizQuestion.setText(c1.getString(0)); radioGroup.removeAllViews(); //*** if (c2.moveToFirst()) { for (int i=0;i&lt;=3;i++) { //Generating and adding 4 radio buttons dynamically radioButton = new RadioButton(this); radioButton.setText(c2.getString(0)); radioButton.setId(i); c2.moveToNext(); radioGroup.addView(radioButton); } } }} </code></pre> <p><strong>Its the database helper class</strong></p> <pre><code>public class DatabaseHelper extends SQLiteOpenHelper{ private static String DB_PATH = "/data/data/com.rika/databases/"; private static String DB_NAME = "test.sqlite"; private static String Table_name="Quiz"; private SQLiteDatabase myDataBase; private SQLiteDatabase myData; 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{ CopyFiles(); } } private boolean checkDataBase() { // TODO Auto-generated method stub return false; } @SuppressWarnings("null") private void CopyFiles() throws IOException { FileOutputStream myOutput = null; try { InputStream is = myContext.getAssets().open(DB_NAME); File outfile = new File(DB_PATH,DB_NAME); outfile.getParentFile().mkdirs(); outfile.createNewFile(); if (is == null) throw new RuntimeException("stream is null"); else { FileOutputStream out = new FileOutputStream(outfile); // BufferedOutputStream out = new BufferedOutputStream( new FileOutputStream(outfile)); byte buf[] = new byte[128]; do { int numread = is.read(buf); if (numread &lt;= 0) break; out.write(buf, 0, numread); } while (true); is.close(); out.close(); } //AssetFileDescriptor af = am.openFd("world_treasure_hunter_deluxe.apk"); } catch (IOException e) { throw new RuntimeException(e); } } /** * 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){ } 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){ byte[] buffer = null; int length = 0; myOutput.write(buffer, 0, length); } finally{} //Close the streams myOutput.flush(); myOutput.close(); FileOutputStream myInput = null; myInput.close(); } public void openDataBase() throws SQLException{ 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 getQuiz_Content(int bookId) { String myPath = DB_PATH + DB_NAME; myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); Cursor cur; cur=myData.rawQuery("select Quiz_text from Quiz where Quiz_id='"+bookId+"'",null); cur.moveToFirst(); cur.moveToNext(); return cur; }; public Cursor getQuiz_List() { String myPath = DB_PATH + DB_NAME; myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); int i; Cursor cur; cur=myData.rawQuery("select Quiz_id,Quiz_text,Correct_Answer from Quiz",null); cur.moveToFirst(); i = cur.getCount(); myData.close(); return cur; }; public Cursor getAns(int quizid) { String myPath = DB_PATH + DB_NAME; myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); Cursor cur; cur = myData.rawQuery("select Answer from Answers where Quiz_id='"+quizid+"'", null); cur.moveToFirst(); myData.close(); return cur; } public Cursor getAnsList() { String myPath = DB_PATH + DB_NAME; myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); Cursor cur; cur = myData.rawQuery("select Answer from Answers", null); cur.moveToFirst(); cur.moveToNext(); myData.close(); return cur; } public Cursor getCorrAns() { String myPath = DB_PATH + DB_NAME; myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); Cursor cur; cur = myData.rawQuery("select Correct_Answer from Quiz", null); cur.moveToFirst(); cur.moveToNext(); myData.close(); return cur; }} </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USkumisku
    1. USkumisku
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    1. PL
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    1. This table or related slice is empty.
    1. PO
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    2. PO
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    2. VO
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      1. VTUpMod
    1. COyou had closed your cursor, post your some code
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    2. COhttp://groups.google.com/group/android-developers/browse_thread/thread/9524337c15985ab9
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      1. USSamir Mangroliya
    3. COif (c3.moveToFirst()) { for (int i=0;i<=4;i++) { corrAns[i]=c3.getString(0); c3.moveToNext(); } } c3.close(); db.close();
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      1. USkumisku
 

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