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POwhy my data is not shown?
 

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  1. POwhy my data is not shown?
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    <p>I am trying to retrieve data from a db. I don't get any error, but the data is not shown. Here is my code:</p> <p>DbHelper</p> <pre><code>public class DbHelper extends SQLiteOpenHelper{ static final String tag="dbHelper"; static final String DB_NAME="dianaaaa.db"; static final int DB_VERSION=1; static final String TABLE_JOBS="jobs"; static final String C_START="start"; static final String C_STOP="stop"; static final String C_ID_J=BaseColumns._ID; Context context; SQLiteDatabase db; public DbHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); // TODO Auto-generated constructor stub this.context=context; } @Override public void onCreate(SQLiteDatabase db) { String sql2="create table "+TABLE_JOBS+"( "+C_ID_J+" INTEGER PRIMARY KEY, "+C_START+" text, "+C_STOP+" text)"; try{ db.execSQL(sql2); } catch(SQLException e){ Log.d(tag, "no"); }finally{ } } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { db.execSQL("drop table if exists "+TABLE_JOBS); Log.d(tag, "onUpdated"); onCreate(db); } public void insertJStart(String s1){ SQLiteDatabase db = (SQLiteDatabase) getWritableDatabase(); ContentValues values=new ContentValues(); values.clear(); values.put(DbHelper.C_START, s1); try{ db.insertOrThrow(TABLE_JOBS, C_START, values); }catch(SQLException e){ Log.d(tag, "nu vreau...."); }finally{ db.close(); } } public void insertJStop(String s2){ SQLiteDatabase db=(SQLiteDatabase) getWritableDatabase(); ContentValues values=new ContentValues(); values.clear(); values.put(DbHelper.C_STOP, s2); db.insertOrThrow(TABLE_JOBS, C_STOP, values); db.close(); } public Cursor getCursor(){ SQLiteQueryBuilder queryBuilder=new SQLiteQueryBuilder(); queryBuilder.setTables(TABLE_JOBS); String[] asColumToRetrun=new String[] { C_ID, C_START, C_STOP}; Cursor mCursor=db.query(TABLE_JOBS, asColumToRetrun, null, null, null, null, "time ASC"); return mCursor; } public String getDate(Cursor c, int i){ return (c.getString(i)); } public Cursor getAll(){ db=this.getReadableDatabase(); Cursor c=db.rawQuery("SELECT * FROM jobs ", new String[]{}); return c; } } </code></pre> <p>Activity:</p> <pre><code>public class TimerDB extends Activity{ static final String tag="TimerDB"; private ListView list; MyAdapter aa=null; private Cursor cursor=null; private DbHelper helper=null; final ArrayList&lt;String&gt; aList=new ArrayList&lt;String&gt;(); @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.times); list=(ListView)findViewById(R.id.timeList); helper=new DbHelper(this); cursor=helper.getAll(); cursor.moveToNext(); startManagingCursor(cursor); aa=new MyAdapter(cursor); list.setAdapter(aa); } class MyAdapter extends CursorAdapter{ MyAdapter(Cursor c){ super(TimerDB.this, c); } public View getView(int position, View convertView, ViewGroup parent){ View row=convertView; if(row==null){ LayoutInflater inflater=getLayoutInflater(); row=inflater.inflate(R.layout.row, null); } return (row); } @Override public void bindView(View row, Context context, Cursor c) { // TODO Auto-generated method stub Holder holder=(Holder) row.getTag(); holder.populateFrom(c, helper); c.moveToNext(); } @Override public View newView(Context context, Cursor c, ViewGroup parent) { // TODO Auto-generated method stub LayoutInflater inflater=getLayoutInflater(); View row=inflater.inflate(R.layout.row, parent, false); Holder holder=new Holder(row); row.setTag(holder); return row; } } static class Holder { private TextView id, start, stop; Holder(View row){ id=(TextView) row.findViewById(R.id.rowViewStart); start=(TextView) row.findViewById(R.id.rowViewStart); stop=(TextView) row.findViewById(R.id.rowViewStop); } void populateFrom(Cursor c, DbHelper db){ id.setText(db.getDate(c, 0)); start.setText(db.getDate(c, 1)); stop.setText(db.getDate(c, 2)); } } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMayank
    1. USDiana C
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
      singulars
      1. POwhy my data is not shown?
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. CODo you have any data in the DB? I could not find a code (in TimerDB activity) which inserts a data into the your DB.
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      1. POwhy my data is not shown?
      1. USTaras Feschuk
    2. COyes, I have another activity where I insert the data is something like this: bStart.setOnClickListener(new OnClickListener() { public void onClick(View v) { dbhelp.insertJStart(clock.getText().toString()); Log.d(tag, "StartButton"); } });
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      1. POwhy my data is not shown?
      1. USDiana C
    3. CO@DianaC Does your list show empty rows?
      singulars
      1. POwhy my data is not shown?
      1. USLuksprog
 

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