我正在为可以参加考试和考试的学生开发一个Android应用程序。我的问题是我有一组问题说50个，每个都有4个答案选项以可选择的列表视图方式。现在，我想问的是，我希望他们只在一个活动中被召唤而不是50个海盗活动。 这是示例代码
/***ArrayList goes here*****/
stuff.add("I'm noting.");
stuff.add("I always do nthing.");
stuff.add("All my efforts");
lv = (ListView) findViewById(R.id.list);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,stuff );
lv.setAdapter(arrayAdapter);
Button sbt=(Button)findViewById(R.id.sbt);
sbt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i=new Intent(getApplicationContext(),Screen5cActivity.class);
startActivity(i);
}
});
因此，我想到的一种方法就是采用静态计数器并继续通过膨胀来自相同arraylist的数据来重新创建相同的活动，但该方法对于存储结果和其他方法有点混淆。 任何其他有效率和更好解释的解决方案都是受欢迎的。
答案 0 :(得分：1)
好的，这就是我如何做到这一点。
我创建了一个MainActivity，如下所示：
public class MainActivity extends FragmentActivity implements QuestionAnswerInterface{
private static final String FRAGMENT_TAG = "QuestionAnswerFragment";
private String [] questionsArray = {"How old was John Wayne when he died ?","Who was the First U.S. President ?", "How many vertices are on a Octagon ?"};
private String [][] answers = {{"43","56","34","none of these"},
{"George Bush","Barrack Obama","George Washington","none of these"},
{"6","4","8","none of these"}
};
private QuestionAnswerFragment fragment = null;
private ArrayList<ArrayList<String>> answersListOfLists = null;
private ArrayList<String> answersList = null;
private ArrayList<String> questionsList = null;
// Ultimate Holder to Link the ArrayLists
private HashMap<ArrayList<String>, ArrayList<ArrayList<String>>> questionAnswerList = null;
@Override protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// -------- Setup the Questions -------
setupQuestions(questionsArray, answers);
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
if(fragment == null)
{
// Create the Fragment
fragment = (QuestionAnswerFragment) QuestionAnswerFragment.newInstance(new Bundle(), "Test Example" , questionAnswerList);
ft.add(R.id.frameLayoutTest, fragment, FRAGMENT_TAG);
ft.commit();
}else{
fragment = (QuestionAnswerFragment) fm.findFragmentByTag(FRAGMENT_TAG);
ft.show(fragment);
}
}
private void setupQuestions(String [] questions, String[][] answers)
{
// The Ultimate Wrapper
questionAnswerList = new HashMap<ArrayList<String>, ArrayList<ArrayList<String>>>();
// ArrayList to hold the List of lists of answers
answersListOfLists = new ArrayList<ArrayList<String>>();
// ArrayList to hold the list of Questions
questionsList = new ArrayList<String>();
// Loop Through the Questions
for(int i = 0; i < questionsArray.length ; i++)
{
// Add them to the List
questionsList.add(questions[i]);
}
//*** Magic Stuff ***
for(int l = 0; l < answers.length ; l++)
{
// Needs to be created each time we add a new set of answers
answersList = new ArrayList<String>();
// Loop through the inner array values
for(int m = 0; m < answers[l].length ; m++)
{
// Add the Answers for index l using values of index m
answersList.add(answers[l][m]);
}
answersListOfLists.add(answersList);
}
questionAnswerList.put(questionsList, answersListOfLists);
}
@Override
public void sendBackAnswer(String answer) {
// TODO Auto-generated method stub
}
}
然后是My Fragment Class：
public class QuestionAnswerFragment extends Fragment{
private static HashMap<ArrayList<String>, ArrayList<ArrayList<String>>> m_questionAnswerList;
private static String m_textName = null;
private static final String TAG = "QuestionAnswerFragment";
private QuestionAnswerInterface m_callBack = null;
private AnswerAdapter m_adapter = null;
private ArrayList<ArrayList<String>> m_answers = null;
private ArrayList<String> m_questions = null;
private int m_questionCount = 0;
private String currentQuestion = null;
private Entry<ArrayList<String>, ArrayList<ArrayList<String>>> entry = null;
private Iterator<Entry<ArrayList<String>, ArrayList<ArrayList<String>>>> iterator = null;
// UI Elements
private ListView m_listViewAnswers = null;
private Button m_buttonSubmitAnswer = null;
private TextView m_textViewQuestion = null;
// ----------------------------------------------------------------------------
// Interface
public interface QuestionAnswerInterface
{
// Returns the Right or wrong Answer to be kept for score calculation
public abstract void sendBackAnswer(String answer);
}
// Instance Method, so we can share the relevant information with the fragment
public static QuestionAnswerFragment newInstance(Bundle args, String testName, HashMap<ArrayList<String>, ArrayList<ArrayList<String>>> questionAnswerList)
{
QuestionAnswerFragment fragment = new QuestionAnswerFragment();
m_textName = testName;
m_questionAnswerList = questionAnswerList;
fragment.setArguments(args);
return fragment;
}
// --------------------------------------------------------------------------
// Class Overrides
@Override public void onAttach(Activity activity)
{
// Default Behavior
super.onAttach(activity);
try{
// Attach the Interface to the Parent Activity
m_callBack = (QuestionAnswerInterface) activity;
}catch(ClassCastException ex){
// Log the Error
Log.d(TAG, "Failed to Implement Interface in the Parent Activity " + ex.getMessage());
}
}
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// Inflate the Layout from the XML Resource
return inflater.inflate(R.layout.question_answer_fragment, null);
}
@Override public void onActivityCreated(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
// Get a Reference to All the Views
m_listViewAnswers = (ListView) getView().findViewById(R.id.listViewAnswerOptions);
m_textViewQuestion = (TextView) getView().findViewById(R.id.textViewQuestion);
m_buttonSubmitAnswer = (Button) getView().findViewById(R.id.buttonDone);
// Add a Listener to the button & ListView
m_buttonSubmitAnswer.setOnClickListener(SubmitListener);
m_listViewAnswers.setOnItemSelectedListener(AnswerListener);
iterator = m_questionAnswerList.entrySet().iterator();
// Start the test from the Beginning using the String [0] as the first question
entry = iterator.next();
m_questions = entry.getKey();
m_answers = entry.getValue();
Log.d("ArraySize Questions", "Size of the Questions Array is "+ m_questions.size());
Log.d("ArraySize Answers", "Size of the Answers Array is "+ m_answers.size());
// Start the Test
updateTest();
}
public void updateTest()
{
m_textViewQuestion.setText(m_questions.get(m_questionCount));
updateAdapter(m_answers.get(m_questionCount));
m_questionCount += 1;
}
private void updateAdapter(ArrayList<String> arrayList)
{
m_adapter = new AnswerAdapter(getActivity(), arrayList);
m_listViewAnswers.setAdapter(m_adapter);
}
private OnItemSelectedListener AnswerListener = new OnItemSelectedListener()
{
@Override public void onItemSelected(AdapterView<?> adapter, View view, int position, long id)
{
// Get the Position of the List Item Selected
// Check if its correct or do what you need to do.
m_callBack.sendBackAnswer(m_listViewAnswers.getSelectedItem().toString());
}
@Override public void onNothingSelected(AdapterView<?> arg0) { }
};
// Submits the Answer to the Parent Activity
private OnClickListener SubmitListener = new OnClickListener()
{
@Override public void onClick(View view)
{
if(m_questionCount != m_questions.size())
{
// Notify the Parent that we want to share the Users choice
updateTest();
}else{
Toast.makeText(getActivity(), "You have reached the End of the Test", Toast.LENGTH_LONG).show();
}
}
};
}
最后是适配器类
public class AnswerAdapter extends BaseAdapter{
//----------------------------------------------------------
// Member Variables
private Context m_classContext = null;
private ArrayList<String> m_answers = null;
private LayoutInflater m_inflater = null;
//----------------------------------------------------------
// Constructor
public AnswerAdapter(Activity activity, ArrayList<String> answers)
{
this.m_classContext = activity;
this.m_answers = answers;
this.m_inflater = LayoutInflater.from(m_classContext);
}
// RowContainer
public class Row
{
TextView m_textAnswer;
CheckBox m_selectedAnswer;
}
// ---------------------------------------------------------
// Class Overrides
@Override public int getCount()
{
int count = 0;
if(m_answers.size() > 0)
{
count = m_answers.size();
}
return count;
}
@Override public Object getItem(int position)
{
// return the Item at the current position
return m_answers.get(position);
}
@Override public long getItemId(int position)
{
// Return the current items position
return position;
}
@Override public View getView(int position, View convertView, ViewGroup parent)
{
Row theRow ;
if(convertView == null){
theRow = new Row();
convertView = m_inflater.inflate(R.layout.answer_row_item, null);
theRow.m_textAnswer = (TextView) convertView.findViewById(R.id.textViewAnswer);
theRow.m_selectedAnswer = (CheckBox) convertView.findViewById(R.id.checkBoxAnswer);
convertView.setTag(theRow);
}else{
theRow = (Row) convertView.getTag();
}
theRow.m_textAnswer.setText(m_answers.get(position).toString());
return convertView;
}
}
那就是我如何处理这个问题。
使用主要活动创建新测试，然后使用界面与父级共享结果，以便计算总计和分数。
答案 1 :(得分：0)
使用变量question.ans1到ans4
创建一个Pojo类i.e
class Question{
String question;
String ansOne;
String ansTwo;
String ansThree;
String ansFour;
String correctAns;
String selectedAnswer;
}
现在生成一个包含50个问题的arraylist;
ArrayList list = new ArrayList（）;
现在生成列表视图，其中包含一个问题文本视图和四个答案的四个复选框。