我正在尝试创建一个应用，该应用在每个问题的前面显示一些问题和EditText字段，以获取CountDownTimer的答案，我遇到的问题是我正在尝试停止最后输入的答案上正在运行的CountDownTimer，并在用户名旁边保存那几秒钟，但不确定如何？我知道questionTimer.cancel()将停止计时器，但必须在最后一个EditText中最后输入的答案上完成。
这是MainActivity.java文件：
public class MainActivity extends AppCompatActivity {
CountDownTimer questionTimer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnStart = (Button) findViewById(R.id.start);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setQuestions();
timer();
}
});
}//End of create()
public void timer() {
questionTimer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
timer = (TextView) findViewById(R.id.timer);
timer.setText("Seconds Remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
timer.setText("Done!");
}
}.start();
}
public void setQuestions() {
ArrayList<Questions> qArrList = new ArrayList<>();
for (int i = 0; i < 5; i++) {
ques = new Questions();
ques.setQuestion("");
qArrList.add(ques);
}
adapter = new AdapterListView(getBaseContext(), R.layout.item_listview, qArrList);
questListView.setAdapter(adapter);
}
}//End of Class
这是AdapterListView.java文件：
public class AdapterListView extends ArrayAdapter<Questions> {
Context mContext;
LayoutInflater inflater;
private ArrayList<Questions> questionsArrayList;
private Questions quesObject;
private ArrayList<String> quesList = new ArrayList<String>();
private int a, b, ab, c, d, cd, e, f, ef, g, h, gh, i, j, ij;
private ArrayList<Integer> answersList = new ArrayList<Integer>();
public AdapterListView(Context context, int resource, ArrayList<Questions> questionsArrayList) {
super(context, resource);
this.mContext = context;
this.setQuestionsArrayList(questionsArrayList);
this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_listview, null);
holder = new ViewHolder();
holder.questionTextView = convertView.findViewById(R.id.question);
holder.editText = convertView.findViewById(R.id.ans_edit_text);
holder.imgTrue = convertView.findViewById(R.id.ans_true);
holder.imgFalse = convertView.findViewById(R.id.ans_false);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
quesObject = getQuestionsArrayList().get(position);
int count = 0;
if (position == 0) count = 1;
else if (position == 1) count = 2;
else if (position == 2) count = 3;
else if (position == 3) count = 4;
else if (position == 4) count = 5;
Random rand = new Random();
a = (rand.nextInt(15) + 1);
b = (rand.nextInt(10) + 1);
ab = a + b;
c = (rand.nextInt(15) + 1);
d = (rand.nextInt(10) + 1);
cd = c + d;
e = (rand.nextInt(15) + 1);
f = (rand.nextInt(10) + 1);
ef = e + f;
g = (rand.nextInt(15) + 1);
h = (rand.nextInt(10) + 1);
gh = g + h;
i = (rand.nextInt(15) + 1);
j = (rand.nextInt(10) + 10);
ij = i + j;
quesList.add(a + " + " + b);
quesList.add(c + " + " + d);
quesList.add(e + " + " + f);
quesList.add(g + " + " + h);
quesList.add(i + " + " + j);
getAnswersList().add(ab);
getAnswersList().add(cd);
getAnswersList().add(ef);
getAnswersList().add(gh);
getAnswersList().add(ij);
holder.questionTextView.setText("Q " + count + ": \t" + quesList.get(position));
holder.editText.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (holder.editText.getText().toString().trim().length() > 0) {
int inputNum = Integer.parseInt(String.valueOf(holder.editText.getText().toString().trim()));
if (getAnswersList().get(position) != inputNum) {
holder.imgFalse.setVisibility(View.VISIBLE);
holder.imgTrue.setVisibility(View.GONE);
} else {
holder.imgTrue.setVisibility(View.VISIBLE);
holder.imgFalse.setVisibility(View.GONE);
}
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
});
return convertView;
}
@Override
public int getCount() {
return getQuestionsArrayList().size();
}
static class ViewHolder {
TextView questionTextView;
EditText editText;
ImageView imgTrue, imgFalse;
}
}
答案 0 :(得分：0)
我已经设法通过针对Position设置一个int变量并在运行的Timer内的MainActivity类中调用此变量来解决该问题。请参见下面的代码。
public class MainActivity extends AppCompatActivity {
CountDownTimer questionTimer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnStart = (Button) findViewById(R.id.start);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setQuestions();
timer();
}
});
}//End of create()
public void timer() {
questionTimer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
timer = (TextView) findViewById(R.id.timer);
timer.setText("Seconds Remaining: " + millisUntilFinished / 1000);
if (adapter.getEndQuiz() == 5) {
questionTimer.cancel();
}
}
public void onFinish() {
timer.setText("Done!");
}
}.start();
}
public void setQuestions() {
ArrayList<Questions> qArrList = new ArrayList<>();
for (int i = 0; i < 5; i++) {
ques = new Questions();
ques.setQuestion("");
qArrList.add(ques);
}
adapter = new AdapterListView(getBaseContext(), R.layout.item_listview, qArrList);
questListView.setAdapter(adapter);
}
}//End of Class
适配器
public class AdapterListView extends ArrayAdapter<Questions> {
Context mContext;
LayoutInflater inflater;
private ArrayList<Questions> questionsArrayList;
private Questions quesObject;
private ArrayList<String> quesList = new ArrayList<String>();
private int a, b, ab, c, d, cd, e, f, ef, g, h, gh, i, j, ij;
private ArrayList<Integer> answersList = new ArrayList<Integer>();
private int endQuiz = 0;
public AdapterListView(Context context, int resource, ArrayList<Questions> questionsArrayList) {
super(context, resource);
this.mContext = context;
this.setQuestionsArrayList(questionsArrayList);
this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_listview, null);
holder = new ViewHolder();
holder.questionTextView = convertView.findViewById(R.id.question);
holder.editText = convertView.findViewById(R.id.ans_edit_text);
holder.imgTrue = convertView.findViewById(R.id.ans_true);
holder.imgFalse = convertView.findViewById(R.id.ans_false);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
quesObject = getQuestionsArrayList().get(position);
int count = 0;
if (position == 0) count = 1;
else if (position == 1) count = 2;
else if (position == 2) count = 3;
else if (position == 3) count = 4;
else if (position == 4) count = 5;
Random rand = new Random();
a = (rand.nextInt(15) + 1);
b = (rand.nextInt(10) + 1);
ab = a + b;
c = (rand.nextInt(15) + 1);
d = (rand.nextInt(10) + 1);
cd = c + d;
e = (rand.nextInt(15) + 1);
f = (rand.nextInt(10) + 1);
ef = e + f;
g = (rand.nextInt(15) + 1);
h = (rand.nextInt(10) + 1);
gh = g + h;
i = (rand.nextInt(15) + 1);
j = (rand.nextInt(10) + 10);
ij = i + j;
quesList.add(a + " + " + b);
quesList.add(c + " + " + d);
quesList.add(e + " + " + f);
quesList.add(g + " + " + h);
quesList.add(i + " + " + j);
getAnswersList().add(ab);
getAnswersList().add(cd);
getAnswersList().add(ef);
getAnswersList().add(gh);
getAnswersList().add(ij);
holder.questionTextView.setText("Q " + count + ": \t" + quesList.get(position));
holder.editText.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (holder.editText.getText().toString().trim().length() > 0) {
int inputNum = Integer.parseInt(String.valueOf(holder.editText.getText().toString().trim()));
if (getAnswersList().get(position) != inputNum) {
holder.imgFalse.setVisibility(View.VISIBLE);
holder.imgTrue.setVisibility(View.GONE);
} else {
holder.imgTrue.setVisibility(View.VISIBLE);
holder.imgFalse.setVisibility(View.GONE);
}
if(position == 0) setEndQuiz(1);
else if(position == 1) setEndQuiz(2);
else if(position == 2) setEndQuiz(3);
else if(position == 3) setEndQuiz(4);
else if(position == 4) setEndQuiz(5);
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
});
return convertView;
}
@Override
public int getCount() {
return getQuestionsArrayList().size();
}
static class ViewHolder {
TextView questionTextView;
EditText editText;
ImageView imgTrue, imgFalse;
}
}