如何保存分数

Question

我正在进行Android测验。我使用SQLite存储问题和答案。它有3个难点：简单，中等和困难。我需要帮助存储每个难度中得分的用户。我想将分数存储在另一项名为Easy 5/5 Medium 5/5 Hard 5/5等分数的活动中。

这是我的数据库：

public class DbHelper extends SQLiteOpenHelper {
    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "QUIZ";
    private static final String TABLE_QUIZ = "quiz";
    private static final String KEY_ID = "id";
    private static final String KEY_QUES = "question";
    private static final String KEY_ANSWER = "answer";
    private static final String KEY_OPTA = "opta";
    private static final String KEY_OPTB = "optb";
    private static final String KEY_OPTC = "optc";
    private static final String KEY_OPTD = "optd";
    private static final String q_level = "level";
    private static final String QuestionNumber = "q_number";
    private SQLiteDatabase dbase;
    public String question, optionA, optionB, optionC, optionD, answer;

    public DbHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        dbase = db;
        String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUIZ + " ( "
            + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES
            + " TEXT, " + KEY_ANSWER + " TEXT, " + KEY_OPTA + " TEXT, "
            + KEY_OPTB + " TEXT, " + KEY_OPTC + " TEXT, " + KEY_OPTD  +" TEXT, " + q_level + " TEXT, " + QuestionNumber + " INTEGER)";
        db.execSQL(sql);
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','EASY','1')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q2','A1','A2','A3','A4','Answer','EASY','2')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q3','A1','A2','A3','A4','Answer','EASY','3')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q4','A1','A2','A3','A4','Answer','EASY','4')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q5','A1','A2','A3','A4','Answer','EASY','5')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','MEDIUM','1')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','MEDIUM','2')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','MEDIUM','3')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','MEDIUM','4')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','MEDIUM','5')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','HARD','1')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','HARD','2')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','HARD','3')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','HARD','4')");
        db.execSQL("INSERT INTO " + TABLE_QUIZ + "(" + KEY_QUES + ", " + KEY_OPTA + ", " + KEY_OPTB + ", " + KEY_OPTC + ", " + KEY_OPTD + ", " + KEY_ANSWER + ", " + q_level + ", " + QuestionNumber + ")VALUES(" +
            "'Q1','A1','A2','A3','A4','Answer','HARD','5')");
        addQuestions();
        //db.close();
    }

    private void addQuestions() { }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUIZ);
        onCreate(db);
    }

    public void getQuestByLevel(String level, int qnum) {
        String selectQuery = "SELECT * FROM " + TABLE_QUIZ +  " WHERE "+ q_level +"  = '"+ level +"' ORDER BY RANDOM() LIMIT 5;";

        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.rawQuery(selectQuery, null);
        if (cursor.moveToFirst()) {
            do {
                question=cursor.getString(cursor.getColumnIndex(KEY_QUES));
                optionA=cursor.getString(cursor.getColumnIndex(KEY_OPTA));
                optionB=cursor.getString(cursor.getColumnIndex(KEY_OPTB));
                optionC=cursor.getString(cursor.getColumnIndex(KEY_OPTC));
                optionD=cursor.getString(cursor.getColumnIndex(KEY_OPTD));
                answer=cursor.getString(cursor.getColumnIndex(KEY_ANSWER));
            } while (cursor.moveToNext());
        }
    }
}

测验活动：

public class QuizActivity extends Activity {
    int score = 0;
    int qnum = 1;
    TextView txtQuestion;
    RadioButton rda, rdb, rdc, rdd;
    Button butNext;
    RadioGroup rdgrp;

    String corAnswer = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        setContentView(R.layout.activity_quiz);
        DbHelper db = new DbHelper(this);
        rdgrp = (RadioGroup) findViewById(R.id.questionAndAnswers);
        txtQuestion = (TextView) findViewById(R.id.textView1);
        rda = (RadioButton) findViewById(R.id.radio0);
        rdb = (RadioButton) findViewById(R.id.radio1);
        rdc = (RadioButton) findViewById(R.id.radio2);
        rdd = (RadioButton) findViewById(R.id.radio3);
        butNext = (Button) findViewById(R.id.button1);

        corAnswer = "";
        onCreateQuestion();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_quiz, menu);
        return true;
    }

    public void onCreateQuestion() {
        String level = getIntent().getExtras().getString("level");
        DbHelper db = new DbHelper(this);
        db.getQuestByLevel(level, qnum);

        txtQuestion.setText(db.question);
        rda.setText(db.optionA);
        rdb.setText(db.optionB);
        rdc.setText(db.optionC);
        rdd.setText(db.optionD);
        corAnswer = db.answer;

        qnum++;
    }

    public void onClickNext(View view) {
        String level = getIntent().getExtras().getString("level");
        DbHelper db = new DbHelper(this);
        db.getQuestByLevel(level, qnum);

        RadioGroup grp = (RadioGroup) findViewById(R.id.questionAndAnswers);
        RadioButton answer = (RadioButton) findViewById(grp.getCheckedRadioButtonId());
        if (answer == null) {
            Toast.makeText(QuizActivity.this, "select an answer please", Toast.LENGTH_SHORT).show();
            return;
        }
        if (corAnswer!= null && corAnswer.equalsIgnoreCase((String) answer.getText())) {
            score++;
            Log.d("answer", "Your score" + score);
        }
        if (qnum <= 5) {

        } else {
            Intent intent = new Intent(QuizActivity.this, ResultActivity.class);
            Bundle b = new Bundle();
            b.putInt("score", score);
            intent.putExtras(b);
            startActivity(intent);
            finish();
        }

        txtQuestion.setText(db.question);
        rda.setText(db.optionA);
        rdb.setText(db.optionB);
        rdc.setText(db.optionC);
        rdd.setText(db.optionD);
        corAnswer = db.answer;
        qnum++;
        rdgrp.clearCheck();
    }
}

Answer 1

您可以在SQLite数据库中创建另一个表（分数表），您可以在其中存储每个测验的用户分数，并使用该表来获取要在其中显示的结果另一项活动。

您可以使用以下狙击来定义得分表：

private static final String TABLE_SCORE= "score";     
String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_SCORE + " ( "
            + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUIZ_ID + "INTEGER, " + SCORE + " INTEGER)";
    db.execSQL(sql);