我正在从列表中动态创建复选框，现在如何检查用户从 android 中的列表中选择了哪个复选框

Question

我正在从列表中动态创建复选框，现在如何检查用户从 android

中的列表中选择了哪个复选框

for (int i = 0; i < languageList.size(); i++) {

    HashMap<String, String> item_hash = new HashMap<String, String>();
    String lang = languageList.get(i).getLanguage();
    final String langId = languageList.get(i).getLanguageId();
    item_hash.put(langId, lang);

    ar[i] = langId;

    // String langId = languageList.get(i).getLanguage_id();
    item_list1.add(item_hash);
    cb = new CheckBox(parentActivity);
    cb.setText(languageList.get(i).getLanguage().toString());
    cb.setId(Integer.parseInt(languageList.get(i).getLanguageId()));

    Button btnSubmit = (Button) findViewById(R.id.btn_submit);

    // show location button click event
    btnSubmit.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            if(cb.isChecked()){
                  System.out.println("id "+cb.getText()+langId);

            }


        }
    });
}

Answer 1

如果您使用 ListView 可能会更好。但是如果你喜欢使用你需要的方式和复选框数组

ArrayList<CheckBox> cbs = new ArrayList<Checkbox>();
for (int i = 0; i < languageList.size(); i++) 
{

    HashMap<String, String> item_hash = new HashMap<String, String>();
    String lang = languageList.get(i).getLanguage();
    final String langId = languageList.get(i).getLanguageId();
    item_hash.put(langId, lang);

    ar[i] = langId;

    // String langId = languageList.get(i).getLanguage_id();
    item_list1.add(item_hash);
    cb = new CheckBox(parentActivity);
    cb.setText(languageList.get(i).getLanguage().toString());
      cb.setId(Integer.parseInt(languageList.get(i).getLanguageId()));
    cbs.add(cb);

}

Button btnSubmit = (Button) findViewById(R.id.btn_submit);

// show location button click event
btnSubmit.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View arg0) {
        for (int i = 0; i < languageList.size(); i++)
            if(cbs.get(i).isChecked())
                 System.out.println("id "+cbs.get(i).getText()+langId);

    }
});

Answer 2

您只需为每个 CheckBox 添加一个唯一的标签，并将其与声明一起放入 CheckListener 中，如下所示：

    // at the class declaration define the following static element 
    static int cb_selected;

    // then inside the for loop
    cb.setTag(i);
    cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if(isChecked)
                cb_selected = Integer.parseInt(buttonView.getTag().toString().trim());
        }
    });

如果你想保存所有勾选的 checkboxes:

    // before the for loop
    final List<String> selected = new ArrayList<>();
    // then inside the for loop
    cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if(isChecked)
                selected.add(buttonView.getTag().toString().trim());
            else
                selected.remove(buttonView.getTag().toString().trim());
        }
    });

所以，当试图查看选中的内容时，只需查看此 ArrayList。

我正在从列表中动态创建复选框，现在如何检查用户从 android 中的列表中选择了哪个复选框

i am creating checkbox dynamically from a list ,now how to check user selected which checkbox from a list in android

checkbox

android