当有人已经点击了 RadioGroup 中的 RadioButton 时，我想停止对 RadioButton 的第二次点击。如果有人点击 2 次，则用户无法更改所选的点击。我试图用 boolean 来阻止这种情况，但它不起作用。我哪里错了？
这是我的代码:
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
rb = (RadioButton) findViewById(checkedId);
user_radio_answer = (String) rb.getText();
rb.setOnClickListener(new View.OnClickListener() {
private boolean isChecked = true;
@Override
public void onClick(View v) {
if (isChecked) {
if (rb.isChecked() ) {
isChecked = false;
}
}
if (correct_answer1.equals(user_radio_answer)) {
rb.setBackgroundColor(Color.GREEN);
// Toast.makeText(getApplicationContext(), "Correct ☺ : " + user_radio_answer, Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Incorrect Answer :( ..Correct Answer : " + correct_answer1, Toast.LENGTH_LONG).show();
rb.setBackgroundColor(Color.parseColor("#FF5733"));
answer1 = rb_answer1.getText().toString();
answer2 = rb_answer2.getText().toString();
answer3 = rb_answer3.getText().toString();
answer4 = rb_answer4.getText().toString();
if (answer1.equals(correct_answer1)) {
rb_answer1.setBackgroundColor(Color.GREEN);
}
if (answer2.equals(correct_answer1)) {
rb_answer2.setBackgroundColor(Color.GREEN);
}
if (answer3.equals(correct_answer1)) {
rb_answer3.setBackgroundColor(Color.GREEN);
}
if (answer4.equals(correct_answer1)) {
rb_answer4.setBackgroundColor(Color.GREEN);
}
}
new RadioHttpAsyncTask().execute("http:xxxxxx-xxxxxxxxxx-xxxxxxxx");
}
});
}
});
最佳答案
只需记住他们是否回答了问题，并记住生成第一个答案的 View (RadioButton)，并在单击 RadioButton 时再次检查 RadioButton。这假定 RadioGroup 中的所有 RadioButton 都具有相同的 onClick 方法。
boolean answered = false;
RadioButton radioAnswer;
public void answer1(View view) {
if (!answered) {
radioAnswer = (RadioButton) view;
answered = true;
} else {
radioAnswer.setChecked(true);
}
}
关于java - 如果已在 Android 中单击，如何防止第二次单击单选按钮？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49400521/