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我想根据radio组的checkedId在ArrayList“arr”中添加数据。我有4个单选按钮“a0,a1,a2,a3”。所以如果我选择a1,数组列表应该添加rb2的值。并选择A1后,如果我选择A2然后在“ARR”以前的值应该得到更新(没有得到的第一个后加入)等on.Any帮助..数据没有被添加到radiolroup的数组列表中?
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group, int checkedId) {
ArrayList<String> arr = new ArrayList<String>();
for (int i = 0; i <= mcq.size(); i++) {
switch (checkedId) {
case R.id.a0:
// do operations specific to this selection
Toast.makeText(getApplication(),
rb1.getText(), Toast.LENGTH_SHORT).show();
break;
case R.id.a1:
// do operations specific to this selection
Toast.makeText(getApplication(),
rb2.getText(), Toast.LENGTH_SHORT).show();
break;
case R.id.a2:
// do operations specific to this selection
Toast.makeText(getApplication(),
rb3.getText(), Toast.LENGTH_SHORT).show();
break;
case R.id.a3:
// do operations specific to this selection
Toast.makeText(getApplication(),
rb4.getText(), Toast.LENGTH_SHORT).show();
break;
}
arr.add(String.valueOf(checkedId));
Log.e("", String.valueOf(arr));
}
}
});
我得到“无法解析符号”。做我必须首先确定其大小@ AlexanderKulyakhtin –