SimpleCursor 어댑터 내 행을 표시하지 않습니다.

Question

내 앱이 내 데이터베이스의 데이터를 표시하지 않습니다. 왜 내 설정이 제대로 완료 되었기 때문에 이것이 작동하지 않는지 알 수 없습니다. 아무도 내 데이터가 표시되지 않는 이유를 알아낼 수 있습니까?

package com.work.plan; 

// multiple imports .... not included for length purpose 

public class WorkoutList extends Activity { 

//==================================================================== 
// Member variables 

private Button addNewWorkout; 
private WorkoutDbAdapter mDbHelper; 
public static final int CREATE_WORKOUT = 1; 
public static final int SET_WORKOUT = 2; 
private String dateCreated = null; 
private Calendar now = null; 
private SimpleDateFormat format = null; 
private ListView myWorkoutList; 



Intent prevIntent ; 
String woName,userName; 

@Override 
public void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.workout_list); 

    addNewWorkout = (Button) findViewById(R.id.btnNewWorkout); 
    prevIntent = getIntent(); 
    userName = prevIntent.getStringExtra("userName"); 

    // do the work for getting the current time and formatting it 
    now = Calendar.getInstance(); 
    format = new SimpleDateFormat("EEE MMM dd hh:mm aaa"); 
    dateCreated = format.format(now.getTime()); 

    mDbHelper = new WorkoutDbAdapter(this); 
    mDbHelper.open(); 

    myWorkoutList = (ListView)findViewById(R.id.workoutList); 
    registerForContextMenu(myWorkoutList); 

    myWorkoutList.setDivider(getResources().getDrawable(R.color.mainDivider)); 
    myWorkoutList.setDividerHeight(1); 
    myWorkoutList.setOnItemClickListener(WorkoutListener); 

    addNewWorkout.setOnClickListener(NewWorkout); 

    fillData(); 
} 

OnClickListener NewWorkout = new OnClickListener(){ 
    // ......... click listener code for my add button 
    // ......... creates a new workout 

}; 
//=============================================================================== 
// 
@Override 
public void onPause(){ 
    super.onPause(); 

} 
//=============================================================================== 
// 
@Override 
public void onResume(){ 
    super.onResume(); 
    mDbHelper.open(); 
} 

@Override 
public void onDestroy(){ 
    super.onDestroy(); 
    mDbHelper.close(); 
} 


//================================================================================ 
// 
// Fill the data for UI rebuilds 
private void fillData(){ 

    Log.d("User_NAME",""+ userName); 

    Cursor workoutCursor = mDbHelper.fetchAllWorkouts(); 
    startManagingCursor(workoutCursor); 

    String [] from = new String [] { WorkoutDbAdapter.KEY_WORKOUT_NAME, 
            WorkoutDbAdapter.KEY_WORKOUT_CREATED_DATE ,WorkoutDbAdapter.KEY_WORKOUT_TYPE}; 

    int [] to = new int [] {R.id.dateCreatedLabel, R.id.nameLabel, R.id.typeLabel}; 

    SimpleCursorAdapter workouts = new SimpleCursorAdapter(this, R.layout.workout_row, workoutCursor, from, to); 

    myWorkoutList.setAdapter(workouts); 


} 

@Override 
public void onCreateContextMenu(ContextMenu menu , View v, ContextMenuInfo menuInfo){ 
    //........ stuff for my menu 
} 

@Override 
public boolean onContextItemSelected(MenuItem item){ 
    //.......... code for my menu, handles menu clicks 
    return super.onContextItemSelected(item); 

} 

//================================================================================ 

OnItemClickListener WorkoutListener = new OnItemClickListener(){ 

    public void onItemClick(AdapterView<?> arg0, View view, int position, 
      final long id) { 
     AlertDialog.Builder dialog = new AlertDialog.Builder(WorkoutList.this) 
     .setIcon(R.drawable.edit) 
     .setTitle("Update Selected Workout") 
     .setMessage("Would you like to update the current Workout? Click continue to proceed.") 
     .setPositiveButton("Continue", new DialogInterface.OnClickListener() { 

      public void onClick(DialogInterface arg0, int arg1) { 
       final Intent i = new Intent(getBaseContext(), ExerciseList.class); 
       i.putExtra(WorkoutDbAdapter.KEY_ROW_ID, id); 
       i.putExtra("workoutName", woName); 
       startActivityForResult(i, SET_WORKOUT); 

      } 
     }) 
     .setNegativeButton("Back", new DialogInterface.OnClickListener() { 

      public void onClick(DialogInterface dialog, int which) { 
       dialog.cancel(); 

      } 
     }); 
     dialog.show(); 

    } 

}; 
} 

내가 다음 SQLite는의 테이블 '운동'을 생성하는 데이터베이스 어댑터를 가지고 :

여기 내 목록보기 코드입니다.

public class WorkoutDbAdapter { 
//========================================================================= 
    // Member Variables 

    public static final String DATABASE_TABLE = "workouts";    
    public static final String KEY_ROW_ID = "_id";     
    public static final String KEY_WORKOUT_EMAIL = "email"; 
    public static final String KEY_WORKOUT_NAME = "workout_name";    
    public static final String KEY_WORKOUT_CREATED_DATE = "created_date"; 
    public static final String KEY_WORKOUT_TYPE = "type"; 


    // string query that creates the table in the database 
    static final String CREATE_TABLE_WORKOUTS = ("CREATE TABLE " + DATABASE_TABLE + "("+ KEY_ROW_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," 
                    + KEY_WORKOUT_EMAIL + " TEXT NOT NULL," 
                    + KEY_WORKOUT_NAME + " TEXT NOT NULL," 
                    + KEY_WORKOUT_CREATED_DATE + " TEXT NOT NULL," 
                    + KEY_WORKOUT_TYPE + " TEXT NOT NULL);"); 


    private final Context m_ClassContext;       // reference to the current class 
    private DatabaseHelper mDbHelper;        // reference the database helper class 
    private SQLiteDatabase mDb;         // reference to the SQLiteDatabase class 


    // class constructor 
    public WorkoutDbAdapter(Context ctx){ 
     this.m_ClassContext = ctx; 
    } 

    // open the database with a reference to this class 
    public WorkoutDbAdapter open() throws SQLException{ 
     this.mDbHelper = new DatabaseHelper(m_ClassContext); 
     this.mDb = mDbHelper.getWritableDatabase(); 
     return this; 
    } 

    // create a work out 
    public long createWorkout(String email, String workoutName, String workoutDate, String workoutType){ 
     ContentValues values = new ContentValues(); 
     values.put(KEY_WORKOUT_EMAIL, email); 
     values.put(KEY_WORKOUT_NAME, workoutName); 
     values.put(KEY_WORKOUT_CREATED_DATE, workoutDate); 
     values.put(KEY_WORKOUT_TYPE, workoutType); 
     long insertValue = this.mDb.insert(DATABASE_TABLE, null, values); 
     return insertValue; 

    } 

    // delete a Work out 
    public boolean deleteWorkout(long rowId){ 
     return this.mDb.delete(DATABASE_TABLE, KEY_ROW_ID + "=" +rowId,null) > 0; 
    } 

//**My error was here** 
    // fetch allWorkouts for this user 
    public Cursor fetchAllWorkouts(String email){ 
     return this.mDb.query(DATABASE_TABLE, new String[]{KEY_ROW_ID, 
KEY_WORKOUT_EMAIL, KEY_WORKOUT_NAME, KEY_WORKOUT_CREATED_DATE, KEY_WORKOUT_TYPE}, 
KEY_WORKOUT_EMAIL+ "='" +email+"'",null,null,null,null); // i removed a null and it works 
    } 

    // fetch a work out 
    public Cursor fetchWorkout(long rowId) throws SQLException{ 
     Cursor mCursor = mDb.query(true, DATABASE_TABLE,new String[]{KEY_ROW_ID, 
        KEY_WORKOUT_EMAIL,KEY_WORKOUT_NAME,KEY_WORKOUT_CREATED_DATE, KEY_WORKOUT_TYPE}, KEY_ROW_ID + "="+rowId, null,null,null,null,null); 
     if(mCursor != null){ 
      mCursor.moveToFirst(); 
     } 
     return mCursor; 
    } 


    public boolean updateWorkout(long rowId, String email, String workoutName, String createdDate, String workoutType){ 
     ContentValues values = new ContentValues(); 
     values.put(KEY_WORKOUT_EMAIL, email); 
     values.put(KEY_WORKOUT_NAME, workoutName); 
     values.put(KEY_WORKOUT_CREATED_DATE, createdDate); 
     values.put(KEY_WORKOUT_TYPE, workoutType); 


     return this.mDb.update(DATABASE_TABLE, values, KEY_ROW_ID +"="+rowId, null)> 0; 
    } 

    // close the database 
    public void close(){ 
     if(mDbHelper != null){ 
      mDbHelper.close(); 
      mDb.close(); 
     } 

    } 
} 

Answer 1

당신은 아마 당신의 데이터베이스 코드 커서 크기 문제로 실행에 실패 SQL 쿼리 0 시계 로그 캣이 커서의 크기를 디버깅 : 여기

는 WorkoutDbAdapter 코드입니다.