Question

我正在开展测验申请。它包含两种类型的测试。 第一个测试包含已修复3个选项的问题。 * 第二个测试包含未修复选项的问题。即根据问题，选项可能是4或5或6。 * 测试结束后，我需要显示评论页面。以下是第一类带有固定选项的测试的评论页面代码。（评论页面应该包含当时为测试显示的问题）< / p>

我的代码：

Review.java

public class Review extends Activity {

    static ArrayList selectedoptionids = Test1.listarray;
    static ArrayList<ArrayList<String>> questionslist = Test2.stringList1;
    static ArrayList<ArrayList<String>> alloptionlist = Test2.optionstablelist;
    static ArrayList<ArrayList<String>> all = new ArrayList<ArrayList<String>>();

    ListView list;
    Button next;
    String op1, op2, op3, op4, op5;
    ArrayList<String> arr1;
    ArrayList<String> arr2;

    int a, i;
    static int k = 0;
    static int p = 1;

    static List<mainlist> entirelist = new ArrayList<mainlist>();
    String  quest;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.review);

        list = (ListView) findViewById(R.id.listlist);

        View header = getLayoutInflater().inflate(
                R.layout.listview_header_text, null);
        list.addHeaderView(header, null, false);

        View footerView = getLayoutInflater().inflate(
                R.layout.listview_footer_text, null);
        list.addFooterView(footerView, null, false);

        next = (Button) findViewById(R.id.next);

        eachquestion();

        lvAdapter adapter = new lvAdapter(this, entirelist) {
            public boolean areAllItemsEnabled() {
                return false;
            }

            public boolean isEnabled(int position) {
                return false;
            }
        };
        list.setAdapter(adapter);
    }


    public void eachquestion() {
        arr1 = new ArrayList<String>();

        for (i = p - 1; i < p + 3; i++) {

            arr1 = questionslist.get(i);
            arr2 = new ArrayList<String>();

            for (int j = 0; j < 5; j++) {

                arr2 = alloptionlist.get(0);
                    if (j == 0) 
                        op1 = arr2.get(2);

                     else if (j == 1) 
                        op2 = arr2.get(2);

                     else if (j == 2) 
                        op3 = arr2.get(2);
                }

            }

    entirelist.add(new mainlist(quest, op1, op2, op3));

        }
    }

}

mainlist.java

public class mainlist {
    String question,option1,option2,option3;

    public mainlist(String question,String option1,String option2,String option3) {
        super();
        this.question = question;
        this.option1 = option1;
        this.option2= option2;
        this.option3 = option3;
        }

    public String getquestion() {
        return question;
    }
    public void setquestion(String question) {
        this.question = question;
    }

    public String getoption1() {
        return option1;
    }
    public void setoption1(String option1) {
        this.option1 = option1;
    }

    public String getoption2() {
        return option2;
    }
    public void setoption2(String option2) {
        this.option2 = option2;
    }

    public String getoption3() {
        return option3;
    }
    public void setoption3(String option3) {
        this.option3 = option3;
    }
}

lvAdapter.java

public class lvAdapter extends BaseAdapter implements OnClickListener {
    private Context context;
     List<mainlist> list11 = Review.entirelist;

    public lvAdapter(Context context, List<mainlist> list11 ) {
        this.context = context;
        this.list11 = list11 ;
    }
    public int getCount() {
        return list11.size();
    }
    public Object getItem(int position) {
        return list11.get(position);
    }

    public long getItemId(int position) {
        return position;
    }


    public View getView(int position, View convertView, ViewGroup viewGroup) {

        mainlist inst  = list11.get(position); 

        if (convertView == null) 
        {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.reviewrow, null);
        }

        TextView question = (TextView) convertView.findViewById(R.id.textView2);
        tvPhone.setText(inst.getquestion());

        TextView option1 = (TextView) convertView.findViewById(R.id.op1);
        option1.setText(inst.getoption1());

        TextView option2 = (TextView) convertView.findViewById(R.id.op2);
        option2.setText(inst.getoption2());

        TextView option3 = (TextView) convertView.findViewById(R.id.op3);
        option3.setText(inst.getoption3());

        return convertView;
    }

    @Override
    public void onClick(View v) {

    }
}

现在我的问题是第一次测试，因为我们知道选项的数量是3所以我已经为1个问题和3个选项编写了setter和getter方法，并且工作正常。但是对于第二种类型的测试如何编写 mainlist.java类，以便为未知数量的选项生成setter和getter方法。

请帮我解决这个问题......我从3天开始就为此奋斗....

提前致谢...

Answer 1

好的，你需要的是class名为Quiz的东西：

public class Quiz
{
    private String question;
    private ArrayList<String> options;   // no need to get separate variable for every option
    public Quiz(String q, ArrayList<String> o)
    {
       super();  this.question = q; this.options = o;
    }
    //setter and getter.. like setOptions() getOptions() setQuestion() etc.. :/
}

现在让你的entirelist Quiz List像这样：

List<Quiz> entirelist = new ArrayList<Quiz>();

现在将单个测验+选项传递给entirelist，如下所示：

ArrayList<String> options = new ArrayList<String>();
options.add(op1);
options.add(op2);
options.add(op3);
entirelist.add(new Quiz(quest,options));

现在在适配器的getView()中，删除所有选项'TextViews，然后按照以下方式添加它们：

public View getView(int position, View convertView, ViewGroup viewGroup) {
        if (convertView == null) 
        {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.reviewrow, null);
        }
        Quiz currentQuiz = list11.get(position);
        TextView question = (TextView) convertView.findViewById(R.id.textView2);
        tvPhone.setText(currentQuiz.getquestion());

        // now add options dynamically..
        ArrayList<String> options = currentQuiz.getOptions();
        for(String option : options)
        {
            TextView optionTextView = new TextView(context);
            optionTextView.setText(option);
            convertView.add(optionTextView);
        }
        return convertView;
}

Answer 2

不要使用XML。

使用Java以编程方式将视图添加到布局中。然后，您可以动态选择适当数量的选项。

（几乎）Android中您可以用XML完成的所有事情，您可以使用Java代码。

如何在android的列表视图中动态显示textviews？

2 个答案: