切换if语句if if语句不显示多项选择

Question

我无法获得四个多项选择按钮和问题textView来显示文本。所发生的事情是有一个意图转移到选定的类别＆＃34;谁＆＃34;或＆＃34;什么＆＃34;。该类别与＆＃34; who＆＃34;和＆＃34;什么＆＃34;如果声明。如果它是其中之一，那么它应该发布问题并贯穿十个问题。我在if语句中使用了一个switch case来帮助区分点击了什么按钮并继续前进。当我运行模拟器时，它会通过四个多选按钮进入屏幕，但文本或文本视图上没有显示任何内容。

public class QuestionActivity extends AppCompatActivity {
List<QuestionsTable> whoQuesList;
List<QuestionsTable> whatQuesList;
int score=0;
int qid=0;
QuestionsTable currentWhatQ;
QuestionsTable currentWhoQ;
Button btnA, btnB, btnC, btnD;
Button butSkip;
TextView txtQuestion;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.question);
    butSkip = (Button) findViewById(R.id.btnSkip);
    MySQLiteHelper db = new MySQLiteHelper(this);
    whoQuesList = db.getAllWhos();
    whatQuesList = db.getAllWhos();
    currentWhatQ = whatQuesList.get(qid);
    currentWhoQ = whoQuesList.get(qid);
}
    public void onClickQuestion(View txtViewQuestion) {
        Bundle d = getIntent().getExtras();
        int c = d.getInt("category");
        String category = Integer.toString(c);

        if ("Who".equals(category)) {
        txtQuestion = (TextView) findViewById(R.id.txtViewQuestion);
        btnA = (Button) findViewById(R.id.btnOptionA);
        btnB = (Button) findViewById(R.id.btnOptionB);
        btnC = (Button) findViewById(R.id.btnOptionC);
        btnD = (Button) findViewById(R.id.btnOptionD);
        setQuestionView();
        switch (txtViewQuestion.getId()) {
            case btnOptionA:
                if (currentWhoQ.getAnswer().equals(btnA.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhoQ = whoQuesList.get(qid);
                    setQuestionView();

                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }
                break;

            case btnOptionB:
                if (currentWhoQ.getAnswer().equals(btnB.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhoQ = whoQuesList.get(qid);
                    setQuestionView();

                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }

                break;
            case btnOptionC:
                if (currentWhoQ.getAnswer().equals(btnC.getText())) {
                    score++;
                }

                if (qid < 10) {
                    currentWhoQ = whoQuesList.get(qid);
                    setQuestionView();
                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }

                break;
            case R.id.btnOptionD:
                if (currentWhoQ.getAnswer().equals(btnD.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhoQ = whoQuesList.get(qid);
                    setQuestionView();
                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }
                break;

        }
    }


    if ("What".equals(category)) {
        MySQLiteHelper db = new MySQLiteHelper(this);
        whoQuesList = db.getAllWhos();
        whatQuesList = db.getAllWhos();
        currentWhatQ = whatQuesList.get(qid);
        currentWhoQ = whoQuesList.get(qid);
        txtQuestion = (TextView) findViewById(R.id.txtViewQuestion);
        btnA = (Button) findViewById(R.id.btnOptionA);
        btnB = (Button) findViewById(R.id.btnOptionB);
        btnC = (Button) findViewById(R.id.btnOptionC);
        btnD = (Button) findViewById(R.id.btnOptionD);
        setWhatQuestionView();
        switch (txtViewQuestion.getId()) {
            case btnOptionA:
                if (currentWhatQ.getAnswer().equals(btnA.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhatQ = whatQuesList.get(qid);
                    setQuestionView();

                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }
                break;

            case btnOptionB:
                if (currentWhatQ.getAnswer().equals(btnB.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhatQ = whatQuesList.get(qid);
                    setQuestionView();

                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }

                break;
            case btnOptionC:
                if (currentWhatQ.getAnswer().equals(btnC.getText())) {
                    score++;
                }

                if (qid < 10) {
                    currentWhatQ = whatQuesList.get(qid);
                    setQuestionView();
                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }

                break;
            case R.id.btnOptionD:
                if (currentWhatQ.getAnswer().equals(btnD.getText())) {
                    score++;
                }
                if (qid < 10) {
                    currentWhatQ = whatQuesList.get(qid);
                    setQuestionView();
                } else {
                    Intent intent = new Intent(QuestionActivity.this, ResultActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("score", score); //Your score
                    intent.putExtras(b); //Put your score to your next Intent
                    startActivity(intent);

                }
                break;

        }
    }

}

public void setQuestionView() {
    txtQuestion.setText(currentWhoQ.getQuestion());
    btnA.setText(currentWhoQ.getMultipleChoiceA());
    btnB.setText(currentWhoQ.getMultipleChoiceB());
    btnC.setText(currentWhoQ.getMultipleChoiceC());
    btnD.setText(currentWhoQ.getMultipleChoiceD());
    qid++;
}

public void setWhatQuestionView() {
    txtQuestion.setText(currentWhatQ.getQuestion());
    btnA.setText(currentWhatQ.getMultipleChoiceA());
    btnB.setText(currentWhatQ.getMultipleChoiceB());
    btnC.setText(currentWhatQ.getMultipleChoiceC());
    btnD.setText(currentWhatQ.getMultipleChoiceD());
    qid++;
}

Answer 1

    Bundle d = getIntent().getExtras();
    int c = d.getInt("category");
    String category = Integer.toString(c);

    if ("Who".equals(category)) {

c的价值是多少？它怎么能平等？＃34;谁＆＃34;或＆＃34;什么＆＃34;？

和其他人一样，使用switch语句中按钮的完整ID。

case R.id.btnOptionA:

而不是

case btnOptionA:

Answer 2

不确定，你的txtViewQuestion是什么类型的数据...... Switch语句与原始数据类型完美配合......

如果您尝试调用Button变量的名称，这将不起作用，因为程序仅适用于内存地址，因此Java将无法为您提供对象的名称（如果它是一个Button）

要解决此问题，您可以将参数传递给方法（例如int） 0表示第一个按钮 1表示第二个按钮 2为第三... 然后你可以＆＃34; Switch＆＃34;这个参数

Answer 3

什么是btnOptionA，btnOptionB和btnOptionC？ txtViewQuestion.getId（）返回一个Integer，在case标签中你应该使用R.id.btnOptionA，R.id.btnOptionB，R.id.btnOptionC ......