我有一个RadioGroup，其中有5个RadioButton＆＃39; s。我接下来还有一个按钮。点击下一步按钮，无线电按钮的文字会发生变化。一切正常，但没有选择一些单选按钮。这是我的xml文件
public class SampleTestQuestionsActivity extends AppCompatActivity {
String totalques, timee, namee, idd;
String strServerResponse;
ProgressDialog nDialog;
ConnectionDetector cd;
Pojo pojo;
SamplePaperPojo samplePaperPojo;
RadioButton s_rb_1, s_rb_2, s_rb_3, s_rb_4, s_rb_5;
RadioGroup s_rbgrp;
private Toolbar toolbar;
TextView s_section, s_time, s_question;
Button s_submit, s_next, s_previous;
private CountDownTimer countDownTimer;
private boolean timerHasStarted = false;
long startTime;
private final long interval = 1 * 1000;
final Context context = this;
ArrayList<String> al_que_title;
ArrayList<String> al_que_id;
ArrayList<String> al_ans1;
ArrayList<String> al_ans2;
ArrayList<String> al_ans3;
ArrayList<String> al_ans4;
ArrayList<String> al_ans5;
ArrayList<String> al_correct;
ArrayList<String> al_exp;
ArrayList<String> al_desc;
String submitQuestionId;
ArrayList<SamplePaperPojo> sampleTest;
RadioButton selectedRbButton;
public static int inc = 0;
String correctAns;
ArrayList<String> selectedAns;
int selectedpos;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sample_test_questions);
toolbar = (Toolbar) findViewById(R.id.app_bar);
toolbar.setTitle("Sample Tests");
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
al_que_title = new ArrayList<String>();
al_que_id = new ArrayList<String>();
al_ans1 = new ArrayList<String>();
al_ans2 = new ArrayList<String>();
al_ans3 = new ArrayList<String>();
al_ans4 = new ArrayList<String>();
al_ans5 = new ArrayList<String>();
al_correct = new ArrayList<String>();
al_exp = new ArrayList<String>();
al_desc = new ArrayList<String>();
selectedAns = new ArrayList<String>();
Intent i =getIntent();
namee = i.getStringExtra("test_name");
totalques = i.getStringExtra("test_ques");
timee = i.getStringExtra("test_time");
idd = i.getStringExtra("test_id");
sampleTest = new ArrayList<SamplePaperPojo>();
Log.e("test_id", ""+idd);
Long ti = Long.valueOf(timee);
startTime = 1000*ti;
s_section = (TextView) findViewById(R.id.sampleSectionName);
s_time = (TextView) findViewById(R.id.sampleTimer);
s_question = (TextView) findViewById(R.id.sampleQuestion);
s_submit = (Button) findViewById(R.id.sampleSubmitAnswer);
s_next = (Button) findViewById(R.id.sampleNext);
s_previous = (Button) findViewById(R.id.samplePrevious);
s_rbgrp = (RadioGroup) findViewById(R.id.s_rbgrp);
s_rb_1 = (RadioButton) findViewById(R.id.SA);
s_rb_2 = (RadioButton) findViewById(R.id.SB);
s_rb_3 = (RadioButton) findViewById(R.id.SC);
s_rb_4 = (RadioButton) findViewById(R.id.SD);
s_rb_5 = (RadioButton) findViewById(R.id.SE);
countDownTimer = new MyCountDownTimer(startTime, interval);
s_time.setText(s_time.getText() + String.valueOf(startTime / 1000));
new NetCheck().execute();
s_next.setVisibility(View.GONE);
s_previous.setVisibility(View.GONE);
s_submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int index_selected = s_rbgrp.indexOfChild(s_rbgrp
.findViewById(s_rbgrp.getCheckedRadioButtonId()));
// get selected radio button from radioGroup
int selectedId = s_rbgrp.getCheckedRadioButtonId();
if (selectedId==-1){
AlertDialog alertDialog = new AlertDialog.Builder(
SampleTestQuestionsActivity.this).create();
alertDialog.setMessage("Please select atleast one answer.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
s_next.setVisibility(View.VISIBLE);
}
});
s_next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
submitQuestionId = al_que_id.get(inc).toString();
s_rb_1.setTextColor(Color.parseColor("#000000"));
s_rb_2.setTextColor(Color.parseColor("#000000"));
s_rb_3.setTextColor(Color.parseColor("#000000"));
s_rb_4.setTextColor(Color.parseColor("#000000"));
s_rb_5.setTextColor(Color.parseColor("#000000"));
int selectedId = s_rbgrp.getCheckedRadioButtonId();
selectedRbButton = (RadioButton) findViewById(selectedId);
selectedRbButton.setChecked(false);
inc = inc + 1;
s_question.setText("" + al_que_title.get(inc).toString());
s_rb_1.setText("" + al_ans1.get(inc).toString());
s_rb_2.setText("" + al_ans2.get(inc).toString());
s_rb_3.setText("" + al_ans3.get(inc).toString());
s_rb_4.setText("" + al_ans4.get(inc).toString());
s_rb_5.setText("" + al_ans5.get(inc).toString());
s_next.setVisibility(View.GONE);
}
});
}
private class NetCheck extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
nDialog = new ProgressDialog(SampleTestQuestionsActivity.this);
nDialog.setMessage("Loading..");
nDialog.setTitle("Please Wait");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Log.e("Post exec calleld", "dfds");
nDialog.dismiss();
s_question.setText("" + al_que_title.get(inc).toString());
s_rb_1.setText("" + al_ans1.get(inc).toString());
s_rb_2.setText("" + al_ans2.get(inc).toString());
s_rb_3.setText("" + al_ans3.get(inc).toString());
s_rb_4.setText("" + al_ans4.get(inc).toString());
s_rb_5.setText("" + al_ans5.get(inc).toString());
countDownTimer.start();
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
cd = new ConnectionDetector(getApplicationContext());
if (!cd.isConnectingToInternet()) {
Handler handler = new Handler(Looper.getMainLooper());
handler.post(
new Runnable() {
@Override
public void run() {
AlertDialog alertDialog = new AlertDialog.Builder(
SampleTestQuestionsActivity.this).create();
alertDialog.setMessage("Error connecting to internet.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
);
}
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpRequest = new HttpPost(
"http://url");
httpRequest.setHeader("Content-Type", "application/json");
SharedPreferences preff = getSharedPreferences(
"MyPref", MODE_PRIVATE);
String userid = preff.getString("id", null);
Log.e("Student id", "" + userid);
JSONObject json = new JSONObject();
json.put("mocktest_id", idd);
json.put("section_id", 1);
Log.e("JSON Object", json.toString());
StringEntity se = new StringEntity(json.toString());
se.setContentEncoding("UTF-8");
se.setContentType("application/json");
httpRequest.setEntity(se);
HttpResponse httpRes = httpClient.execute(httpRequest);
java.io.InputStream inputStream = httpRes.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader reader = new BufferedReader(inputStreamReader);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
inputStream.close();
strServerResponse = sb.toString();
Log.e("Server Response", "" + strServerResponse.toString());
if (strServerResponse != null) {
try {
JSONArray arr1 = new JSONArray(strServerResponse);
JSONObject jsonObj1 = arr1.getJSONObject(0);
samplePaperPojo = new SamplePaperPojo();
for (int i = 0; i < arr1.length(); i++) {
JSONObject jobjj11 = arr1
.getJSONObject(i);
String qq_id = jobjj11.optString("id");
String qq_title = jobjj11.optString("title");
String qq_des = jobjj11.optString("description");
String ans_a = jobjj11.optString("ans_a");
String ans_b = jobjj11.optString("ans_b");
String ans_c = jobjj11.optString("ans_c");
String ans_d = jobjj11.optString("ans_d");
String ans_e = jobjj11.optString("ans_e");
String right_ans = jobjj11.optString("right_ans");
String explanation = jobjj11.optString("explanation");
samplePaperPojo.setSampleQuesId(qq_id);
samplePaperPojo.setSampleQuesTitle(qq_title);
samplePaperPojo.setSampleAns1(ans_a);
samplePaperPojo.setSampleAns2(ans_b);
samplePaperPojo.setSampleAns3(ans_c);
samplePaperPojo.setSampleAns4(ans_d);
samplePaperPojo.setSampleAns5(ans_e);
samplePaperPojo.setSampleRightAns(right_ans);
samplePaperPojo.setSampleQuesDescription(qq_des);
samplePaperPojo.setSampleExplaination(explanation);
sampleTest.add(samplePaperPojo);
al_que_id.add(qq_id);
al_que_title.add(qq_title);
al_ans1.add(ans_a);
al_ans2.add(ans_b);
al_ans3.add(ans_c);
al_ans4.add(ans_d);
al_ans5.add(ans_e);
al_correct.add(right_ans);
al_exp.add(explanation);
al_desc.add(qq_des);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler",
"Couldn't get any data from the url");
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
}
单击下一个按钮后，当文本更改时，未选中我之前选择的单选按钮。请帮忙
答案 0 :(得分：3)
你应该替换：
int selectedId = s_rbgrp.getCheckedRadioButtonId();
selectedRbButton = (RadioButton) findViewById(selectedId);
selectedRbButton.setChecked(false);
使用：
s_rbgrp.clearCheck();