SQLiteデータベースを表示するリストビューをリフレッシュする方法

Question

私は、ユーザーとそのユーザー名、トピック、タイムスタンプの結果を保存し、このデータをリストビューに入れることに固執している小さな問題があるクイズアプリケーションを持っています。

最初の写真のタイムスタンプからわかるように、リストビューが更新されないことに気付きました。私は4回のクイズを取っていますが、このアクティビティを訪れた前回の結果を取り除いていません。 Image of the results in the xml activity.これは私がリサイクラービューの代わりに、リストビューを使用するようにアドバイスうdisplay_results.java Logcat of results

内のログメッセージから何logcat戻っDatabaseHelper.java

public class DatabaseHelper extends SQLiteOpenHelper { 
    private static final String DATABASE_NAME = "FYPSQLApplicationA.db"; 

    private static int DATABASE_VERSION = 3; 
    private SQLiteDatabase SQLITEDATABASE; 


    /*Users Table*/ 
    public static final String USERS = "USERS"; 
    // public static final String COLUMN_ID = "USER_ID"; 
    public static final String COLUMN_USERNAME = "USERNAME"; 
    public static final String COLUMN_PASSWORD = "PASSWORD"; 
    public static final String COLUMN_NAME = "NAME"; 
    public static final String COLUMN_EMAIL = "EMAIL"; 
    public static final String COLUMN_PHRASE = "PHRASE"; 

    private static final String CREATE_USERS = "CREATE TABLE " + USERS + 
      "(" + 
      COLUMN_USERNAME + " TEXT PRIMARY KEY , " + 
      COLUMN_PASSWORD + " TEXT NOT NULL , " + 
      COLUMN_NAME + " TEXT , " + 
      COLUMN_EMAIL + " TEXT , " + 
      COLUMN_PHRASE + " TEXT NOT NULL);"; 

// MAY INCLUDE A USER ID COLUMN COLUMN_ID + " INT NOT NULL , " + 

    /*Topics Table*/ 
    public static final String TOPICS = "TOPICS"; 
    public static final String TOPIC_ID = "TOPIC_ID"; 
    public static final String TOPIC_NAME = "TOPIC_NAME"; 
    public static final String CHAPTER_ID = "CHAPTER_ID"; 
    public static final String CHAPTER_NAME = "CHAPTER_NAME"; 

    private static final String CREATE_TOPICS = " CREATE TABLE " + TOPICS + 
      " (" 
      + TOPIC_ID + " INT PRIMARY KEY , " 
      + TOPIC_NAME + " TEXT NOT NULL , " 
      + CHAPTER_ID + " INT NOT NULL , " 
      + CHAPTER_NAME + " TEXT NOT NULL " + ");"; 


    /*Results Table*/ 
    private static final String RESULTS = "RESULTS"; 
// private static final String TEST_COLUMN_USERNAME = "USERNAME"; 
    private static final String COLUMN_SCORE = "SCORE"; 
// private static final String COLUMN_TIMES_TAKEN = "TIMES_TAKEN"; 
    private static final String COLUMN_TIMESTAMP = "TIMESTAMP"; 



    private static final String CREATE_RESULTS = " CREATE TABLE " + RESULTS + 
       " ( 

" + 
       COLUMN_USERNAME + " TEXT NOT NULL , " + 
       TOPIC_ID + " INT NOT NULL , " + 
       COLUMN_SCORE + " SCORE INT NOT NULL , " + 
       COLUMN_TIMESTAMP + " TIMESTAMP TEXT NOT NULL , " + 
       "FOREIGN KEY(TOPIC_ID) REFERENCES TOPICS(TOPIC_ID) " + 
       "FOREIGN KEY(USERNAME) REFERENCES USERS(USERNAME) " + "); "; 


    /*Questions Table*/ 
    private static final String QUESTIONS = "QUESTIONS"; 
    private static final String QUESTIONS_ID = "QUESTION_ID"; 
    private static final String QUESTIONTEXT = "QUESTION"; 
    private static final String ANSWER_A = "ANSWER_A"; //option a 
    private static final String ANSWER_B = "ANSWER_B"; //option b 
    private static final String ANSWER_C = "ANSWER_C"; //option c 
    private static final String QUESTION_ANSWER = "ANSWER"; //correct option 

    private static final String CREATE_QUESTIONS = " CREATE TABLE " + 
      QUESTIONS + " (" + 
      TOPIC_ID + " INT NOT NULL , " + 
      QUESTIONS_ID + " INT PRIMARY KEY , " + 
      QUESTIONTEXT + " TEXT NOT NULL , " + 
      ANSWER_A + " TEXT NOT NULL , " + 
      ANSWER_B + " TEXT NOT NULL , " + 
      ANSWER_C + " TEXT NOT NULL , " + 
      QUESTION_ANSWER + " INT NOT NULL , " + 
      "FOREIGN KEY(TOPIC_ID) REFERENCES TOPICS(TOPIC_ID) " + "); "; 



    private static Context context; 

    public DatabaseHelper(Context c, String name, SQLiteDatabase.CursorFactory factory, int version) { 
     super(c, name, factory, version); 
    } 
    public DatabaseHelper(Context c) { 
     super(context = c, DATABASE_NAME, null, DATABASE_VERSION); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     SQLITEDATABASE = db; 
     db.execSQL(CREATE_USERS); 
     db.execSQL(CREATE_TOPICS); 
     db.execSQL(CREATE_QUESTIONS); 
     db.execSQL(CREATE_RESULTS); 
     addQuestions(); 
     addTopics(); 
     this.SQLITEDATABASE = db; 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldV, int newV) { 
     // Drop older table if existed 
     String queryuser = "DROP TABLE IF EXISTS " + USERS; 
     String queryquestion = "DROP TABLE IF EXISTS " + QUESTIONS; 
     String querytopic = "DROP TABLE IF EXISTS " + TOPICS; 
     String queryresult = "DROP TABLE IF EXISTS " + RESULTS; 

     db.execSQL(queryuser); 
     db.execSQL(queryquestion); 
     db.execSQL(querytopic); 
     db.execSQL(queryresult); 

     // Create tables again 
     onCreate(db); 
    } 








    public void insertScore (ScoreDetails SD) { 
     SQLITEDATABASE = this.getWritableDatabase(); 
     ContentValues values = new ContentValues(); 

     values.put(COLUMN_USERNAME, SD.GetUsername()); 
     values.put(TOPIC_ID, SD.GetTopic()); 
     values.put(COLUMN_SCORE, SD.GetScore()); 
     values.put(COLUMN_TIMESTAMP, SD.getCurrentTimeStamp()); 


     SQLITEDATABASE.insert(RESULTS, null, values); 
     SQLITEDATABASE.close(); 
    } 


    // Getting All Contacts 
    public List<ScoreDetails> getAllResults() { 
     List<ScoreDetails> ResultList = new ArrayList<ScoreDetails>(); 
     // Select All Query 



      GlobalVariables GlobalUser = new GlobalVariables(); 

/*  String selectQuery = "SELECT * FROM " + RESULTS; 
     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null);*/ 

     String log = "global username "+ GlobalUser.GetUsername(); 
     // Writing Contacts to log 
     Log.d("Name: ", log); 

     String log11 = " SELECT * FROM RESULTS WHERE " + " USERNAME = " + " '" + username + "' " ; 
     // Writing Contacts to log 
     Log.d("LOG QUERY Name: ", log11); 

       SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(" SELECT * FROM RESULTS WHERE " + " USERNAME = " + 
       " '" + username + "' ", null); 

/*  String selectQuery = "SELECT * FROM " + RESULTS + " WHERE USERNAME = ?";*/ 

/*  SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, new String[]{GlobalUser.GetUsername()});*/ 

     // looping through all rows and adding to list 
     if (cursor.moveToFirst()) { 
      do { 
       ScoreDetails SD = new ScoreDetails(); 
       SD.SetUsername(cursor.getString(0)); 
       SD.SetTopic(Integer.parseInt(cursor.getString(1))); 
       SD.SetScore(Integer.parseInt(cursor.getString(2))); 
       SD.SetCurrentTimeStamp(cursor.getString(3)); 

       String name = cursor.getString(0) +"\n"+ cursor.getString(1) +"\n"+ cursor.getString(2) 
         +"\n"+ cursor.getString(3); 
       Display_results.ArrayofResults.add(name); 
       // Adding contact to list 
       ResultList.add(SD); 
      } while (cursor.moveToNext()); 
     } 
     // return contact list 
     return ResultList; 
    } 


} 

Display_results.java

public class Display_results extends AppCompatActivity { 
private ListView gridView; 
public static ArrayList<String> ArrayofResults = new ArrayList<String>(); 


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

    DatabaseHelper db = new DatabaseHelper(this); 
      List<ScoreDetails> results = db.getAllResults(GlobalVariables.getInstance().GetUsername()); 

    for (ScoreDetails SD : results) { 
     String log = "Id: "+ SD.GetUsername() 
       +" ,Name: " + SD.GetTopic() 
       + " ,Phone: " + SD.GetScore() 
       + " ,Phone: " + SD.getCurrentTimeStamp() ; 
     // Writing Contacts to log 
     Log.d("Name: ", log); 

    } 

    /*db.close();*/ 

    gridView = (ListView) findViewById(R.id.contentlist); 

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
      android.R.layout.simple_list_item_1, ArrayofResults); 

    gridView.setAdapter(adapter); 

    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     public void onItemClick(AdapterView<?> parent, View v, 
           int position, long id) { 
      Toast.makeText(getApplicationContext(), 
        ((TextView) v).getText(), Toast.LENGTH_SHORT).show(); 
     } 
    }); 

} 

/* 
    public void onPause() { 
     super.onPause(); 
     finish(); 
    }*/ 
} 

Answer 1

String selectQuery = "SELECT * FROM " + RESULTS + " WHERE USERNAME =?"; 

SQLiteDatabase db = this.getWritableDatabase(); 

Cursor cursor = db.rawQuery(selectQuery, new String[]{GlobalUser.GetUsername()}); 

Answer 2

ですしかし、これはあなたが求めているものではありません。

insertScoreを決して呼び出しませんか？