[英]preventing a user from entering multiple answer
我创建了一个真/假测验应用程序。 在该应用程序中,我有 4 个按钮,即 True、False、上一个(返回上一个问题)、下一个(获得下一个问题)。 我想在用户单击 true 或 false 按钮时添加一项功能,该功能将禁用该问题,以便用户只能为一个问题单击一次。
我试图通过使用 button.setEnabled(false) 禁用按钮,但是当我单击上一个按钮或下一个按钮时,真/假按钮已启用。我希望用户只能单击一次答案,不管用户有多少遍历问题。
我尝试在单击按钮之前调用 setEnabledButton() ,但它禁用了该按钮,但它也禁用了用户是否单击应答。
Button btrue,bfalse,bnext,bprevious;
TextView tquestion;
int mCurrentIndex=0;
Questions[] questionbank;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btrue=findViewById(R.id.true_button);
bfalse=findViewById(R.id.false_button);
bnext=findViewById(R.id.next_button);
tquestion=findViewById(R.id.question_text);
bprevious=findViewById(R.id.previous_button);
questionbank = new Questions[]
{
new Questions(R.string.greater,false),
new Questions(R.string.Pm,true),
new Questions(R.string.capital,true),
new Questions(R.string.china,false),
new Questions(R.string.Richer,false),
new Questions(R.string.company,true),
new Questions(R.string.company1,false),
};
update();
bnext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int s=questionbank.length;
if( mCurrentIndex<=s )
{
if (mCurrentIndex + 1 < questionbank.length) {
mCurrentIndex++;
}
else
{ Toast.makeText(getApplicationContext(),"not more question",Toast.LENGTH_SHORT).show();
}
update();
}
}
});
btrue.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
checkAnswer(true);
}
});
bfalse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
checkAnswer(false);
}
});
bprevious.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mCurrentIndex > 0) {
mCurrentIndex = (mCurrentIndex - 1);
update();
}
else
{ Toast.makeText(getApplicationContext(), "cant go back", Toast.LENGTH_SHORT).show(); }
}
});
}
public void update()
{
int ques = questionbank[mCurrentIndex].getmTextResid();
tquestion.setText(ques);
setButtonEnabled(true);
}
private void checkAnswer(boolean userPressedTrue)
{
boolean answerIsTrue =
questionbank[mCurrentIndex].ismTrueAnswer();
int messageResId = 0;
if (userPressedTrue == answerIsTrue) {
setButtonEnabled(false);
messageResId = R.string.correct_toast;
} else {
setButtonEnabled(false);
messageResId = R.string.incorrect_toast;
}
Toast.makeText(this, messageResId,
Toast.LENGTH_SHORT)
.show();
}
private void setButtonEnabled(boolean enabled) {
btrue.setEnabled(enabled);
bfalse.setEnabled(enabled);
}
}
在 Questions 类中,您可以创建一个方法,
public class Questions {
boolean isQuestionAnswered;
public boolean isQuestionAnswered() {
return isQuestionAnswered;
}
public void setQuestionAnswered(boolean questionAnswered) {
isQuestionAnswered = questionAnswered;
}
}
private void checkAnswer(boolean userPressedTrue)
{
questionbank[mCurrentIndex].setQuestionAnswered(true);
boolean answerIsTrue =
questionbank[mCurrentIndex].ismTrueAnswer();
int messageResId = 0;
if (userPressedTrue == answerIsTrue) {
setButtonEnabled(false);
messageResId = R.string.correct_toast;
} else {
setButtonEnabled(false);
messageResId = R.string.incorrect_toast;
}
Toast.makeText(this, messageResId,
Toast.LENGTH_SHORT)
.show();
}
public void update()
{
int ques = questionbank[mCurrentIndex].getmTextResid();
tquestion.setText(ques);
if(questionbank[mCurrentIndex].isQuestionAnswered())
setButtonEnabled(false);
else
setButtonEnabled(true);
}
试试这个,看看这是否能解决你的问题
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.