我正在创建一个应用程序，其中我需要预先检查动态创建的复选框的特定或多个选项。到目前为止，我已经能够创建并获取动态创建的复选框的id并将其存储在arraylist中。我的问题是如何使用arraylist的值，例如：[1,2]并预先选中复选框的选项1和2
这是我的代码：
private void addCheckButtons() {
public static ArrayList<String> selchkboxlist=new ArrayList<String>();
String chk,isa;
String options[] = { op1, op2, op3, op4,op5 };
for (int i = 0; i <totalchoice; i++) {
checkedTextView=new CheckBox(this);
checkedTextView.setText("");
checkedTextView.setId(i);
checkedTextView.setText(options[i]);
checkedTextView.setTextColor(Color.BLACK);
checkedTextView.setOnClickListener( new View.OnClickListener()
{
public void onClick(View v)
{
CheckBox cb = (CheckBox) v ;
if (((CheckBox) v).isChecked()) {
chk = Integer.toString(v.getId()+1);
selchkboxlist.add(chk);
}
else if (!((CheckBox) v).isChecked()){
chk = Integer.toString(v.getId()+1);
selchkboxlist.remove(chk);
System.out.println("RemoveCHECK="+selchkboxlist);
}
isa=String.valueOf(selchkboxlist);
String regex = "\\[|\\]";
isa=isa.replaceAll(regex, "");
}
});
rc.addView(checkedTextView);
}
}}
答案 0 :(得分：0)
使用setChecked()方法。这样您就可以更改Widget的已检查状态。
[编辑]这是我想出的东西（没有保证，我没有编译或测试它！）
private void addCheckButtons() {
// This must be prepopulated with checked items. Also, is static the right storage class?
public static Set<Integer> selchkboxlist = new Set<Integer>();
String options[] = { op1, op2, op3, op4,op5 };
for (int i = 0; i <totalchoice; i++) {
checkedTextView=new CheckBox(this);
checkedTextView.setText("");
checkedTextView.setId(i);
checkedTextView.setText(options[i]);
checkedTextView.setTextColor(Color.BLACK);
checkedTextView.setChecked(selchkboxlist.contains(i));
checkedTextView.setOnClickListener( new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
if (cb.isChecked()) {
selchkboxlist.add(i);
}
else{
selchkboxlist.remove(i);
System.out.println("RemoveCHECK="+selchkboxlist);
}
}
});
rc.addView(checkedTextView);
}
}}
答案 1 :(得分：0)
试试这个代码它会起作用（我在一个arrayList中维护状态）
ArrayList<MyQuestionBean> mList=new ArrayList<MyQuestionBean>();
在MainActivity.java中
public class MainActivity extends Activity {
protected static final String TAG = "MainActivity";
private LinearLayout mLayout;
private ArrayList<MyQuestionBean> mQuestionsList;
private int current_questionID = 0;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
mLayout = (LinearLayout) findViewById(R.id.questionlayoutid);
mQuestionsList = getQuestionsList();
}
@Override
protected void onResume() {
super.onResume();
showCurrentQuestion(current_questionID);
}
private void showCurrentQuestion(final int qustionID) {
current_questionID = qustionID;
// for question number
final MyQuestionBean mMyQuestionBean = mQuestionsList.get(qustionID);
Log.v(TAG, mMyQuestionBean + "");
TextView mQuestionNo = new TextView(this);
mQuestionNo.setText(mMyQuestionBean.getQuestion_id() + "");
mQuestionNo.setPadding(10, 10, 10, 10);
mQuestionNo.setTextColor(getResources().getColor(R.color.black));
// for question
TextView mQuestion = new TextView(this);
mQuestion.setText(mMyQuestionBean.getQuestion_name());
mQuestion.setPadding(10, 10, 10, 10);
mQuestion.setTextColor(getResources().getColor(R.color.black));
// adding question and answer
mLayout.addView(mQuestionNo);
mLayout.addView(mQuestion);
// create the check box as per the number of options in
String[] options_answers = mMyQuestionBean.getOptions_answers();
ArrayList<CheckBox> mBoxs = new ArrayList<CheckBox>();
for (int i = 0; i < options_answers.length; i++) {
CheckBox mCheckBx = new CheckBox(this);
mCheckBx.setText(options_answers[i]);
mCheckBx.setId(i);
mCheckBx.setTextColor(Color.BLACK);
mLayout.addView(mCheckBx);
mBoxs.add(mCheckBx);
mCheckBx.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
if (mMyQuestionBean.isAnswered()) {
String mQuestion_result = mMyQuestionBean.getQuestion_result();
mQuestion_result = mQuestion_result + buttonView.getId();
mMyQuestionBean.setQuestion_result(mQuestion_result);
} else {
mMyQuestionBean.setQuestion_result(buttonView.getId() + "");
mMyQuestionBean.setAnswered(true);
}
}
}
});
}
for (int i = 0; i < mBoxs.size(); i++) {
CheckBox checkBox = mBoxs.get(i);
if (mMyQuestionBean.getQuestion_result().contains(i + "")) {
checkBox.setChecked(true);
} else {
checkBox.setChecked(false);
}
}
}
public void nextQuestion(View v) {
int temp = current_questionID + 1;
if (temp < mQuestionsList.size()) {
mLayout.removeAllViews();
showCurrentQuestion(temp);
}
}
public void previousQuestion(View v) {
int temp = current_questionID - 1;
if (temp >= 0) {
mLayout.removeAllViews();
showCurrentQuestion(temp);
}
}
private MyQuestionBean getQuestion(int questionNumber, String questionName, String[] option_answers) {
// By default isAnswered is false and question_result is empty("")
MyQuestionBean mBean = new MyQuestionBean();
mBean.setQuestion_id(questionNumber);
mBean.setQuestion_name(questionName);
mBean.setOptions_answers(option_answers);
mBean.setAnswered(false);
mBean.setQuestion_result("");
return mBean;
}
private ArrayList<MyQuestionBean> getQuestionsList() {
ArrayList<MyQuestionBean> myQuestionBeans = new ArrayList<MyQuestionBean>();
MyQuestionBean question1 = getQuestion(1, "what is your favorite color", new String[] { "red", "green", "blue" });
MyQuestionBean question2 = getQuestion(2, "what is your favorite hero", new String[] { "ram", "ajith", "komal", "chandu" });
MyQuestionBean question3 = getQuestion(3, "what is your favorite place", new String[] { "hyd", "banguluru" });
myQuestionBeans.add(question1);
myQuestionBeans.add(question2);
myQuestionBeans.add(question3);
return myQuestionBeans;
}
}
在MyQuestionBean.java中
public class MyQuestionBean {
private String question_name;
private int question_id;
private String[] options_answers;
private boolean isAnswered;
private String question_result;
public String[] getOptions_answers() {
return options_answers;
}
public void setOptions_answers(String[] options_answers) {
this.options_answers = options_answers;
}
public int getQuestion_id() {
return question_id;
}
public void setQuestion_id(int question_id) {
this.question_id = question_id;
}
public boolean isAnswered() {
return isAnswered;
}
public void setAnswered(boolean isAnswered) {
this.isAnswered = isAnswered;
}
public String getQuestion_result() {
return question_result;
}
public void setQuestion_result(String question_result) {
this.question_result = question_result;
}
public String getQuestion_name() {
return question_name;
}
public void setQuestion_name(String question_name) {
this.question_name = question_name;
}
public MyQuestionBean() {
super();
}
}
在activity_main.xml
中<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main_activity"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/questionlayoutid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:orientation="vertical"
android:paddingTop="10dp" >
</LinearLayout>
<Button
android:id="@+id/nextbttnid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:onClick="nextQuestion"
android:layout_alignParentRight="true"
android:text="nextbttn" />
<Button
android:id="@+id/previousbttnid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:onClick="previousQuestion"
android:text="prevbttn" />
</RelativeLayout>