Question

RadioGroup rg;
RadioButton rb1,rb2,rb3,rb4;
Button chk,next;
TextView que;
public static int Marks,Correct,wrong;
int flag = 0;
public static String[] question={"11*11","2+5","19/1"};
public static String[] ans={"121","7","19"};
String[] opt={"22","131","121","1111","25","7","52","70","19","1","not Possible","0"};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_question);
    que=(TextView)findViewById(R.id.textView1);
    chk=(Button)findViewById(R.id.button1);
    next=(Button)findViewById(R.id.button2);
    rb1=(RadioButton)findViewById(R.id.rb1);
    rb2=(RadioButton)findViewById(R.id.rb2);
    rb3=(RadioButton)findViewById(R.id.rb3);
    rb4=(RadioButton)findViewById(R.id.rb4);
    rg=(RadioGroup)findViewById(R.id.radioGroup1);


next.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            RadioButton uans =  (RadioButton)findViewById(rg.getCheckedRadioButtonId());
            String uansText = uans.getText().toString();

            if(uansText.equals(ans[flag]))
            {

                Correct++;
            }
            else
            {
                wrong++;
            }
            int len = que.length()-1;
            flag++;
        if(flag<=len)
        {
            que.setText(question[flag]);
            rb1.setText(opt[(flag*4)]);
            rb2.setText(opt[(flag*4)+1]);
            rb3.setText(opt[(flag*4)+2]);
            rb4.setText(opt[(flag*4)+3]);

        }
        else {

            Intent in = new Intent(getApplicationContext(), Result.class);
            startActivity(in);
        }



        }
    });

我正在开发一个测验应用程序，当我们按下一个按钮时，它会检查正确的答案，然后显示新的问题和选项，在完成所有问题后，它将在新的结果活动中显示结果。

当我们到达最后一个问题而不是切换到结果活动时，它会抛出一个错误行数组indexoutofbound。

帮我解决这个错误提前谢谢你

Answer 1

从if条件中删除=签名或用以下代码替换您的代码...希望此帮助

if(flag<len)
        {
            que.setText(question[flag]);
            rb1.setText(opt[(flag*4)]);
            rb2.setText(opt[(flag*4)+1]);
            rb3.setText(opt[(flag*4)+2]);
            rb4.setText(opt[(flag*4)+3]);

        }
        else {

            Intent in = new Intent(getApplicationContext(), Result.class);
            startActivity(in);
        }

Answer 2

// try this way,hope this will help you...

    RadioGroup rg;
    RadioButton rb1, rb2, rb3, rb4;
    Button chk, next;
    TextView que;
    public int Correct, wrong;
    int flag = 0;
    public static String[] question = {"11*11", "2+5", "19/1"};
    public static String[] ans = {"121", "7", "19"};
    String[] opt = {"22", "131", "121", "1111", "25", "7", "52", "70", "19", "1", "not Possible", "0"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        que = (TextView) findViewById(R.id.que);
        chk = (Button) findViewById(R.id.chk);
        next = (Button) findViewById(R.id.next);
        rb1 = (RadioButton) findViewById(R.id.rb1);
        rb2 = (RadioButton) findViewById(R.id.rb2);
        rb3 = (RadioButton) findViewById(R.id.rb3);
        rb4 = (RadioButton) findViewById(R.id.rb4);
        rg = (RadioGroup) findViewById(R.id.rg);

        que.setText(question[flag]);
        rb1.setText(opt[(flag * 4)]);
        rb2.setText(opt[(flag * 4) + 1]);
        rb3.setText(opt[(flag * 4) + 2]);
        rb4.setText(opt[(flag * 4) + 3]);

        next.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                RadioButton uans = (RadioButton) findViewById(rg.getCheckedRadioButtonId());
                String uansText = uans.getText().toString();
                if (uansText.equals(ans[flag])) {
                    Correct++;
                } else {
                    wrong++;
                }
                int len = question.length;
                flag++;
                if (flag < len) {
                    que.setText(question[flag]);
                    rb1.setText(opt[(flag * 4)]);
                    rb2.setText(opt[(flag * 4) + 1]);
                    rb3.setText(opt[(flag * 4) + 2]);
                    rb4.setText(opt[(flag * 4) + 3]);

                } else {
                  Intent in = new Intent(getApplicationContext(), Result.class);
                  startActivity(in);
                }


            }
        });

        chk.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                RadioButton uans = (RadioButton) findViewById(rg.getCheckedRadioButtonId());
                String uansText = uans.getText().toString();
                if (uansText.equals(ans[flag])) {
                    Toast.makeText(MainActivity.this,"Your Ans Is Correct",Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this,"Your Ans Is Wrong",Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

在测验应用程序中的android数组indexoutofbound

2 个答案: