make if if只检查一个命令

Question

我有一个ViewFlipper和一个下一个按钮，我希望按钮在检查并执行一个命令后停止我希望它停止检查其余的按钮，除非我再次点击它

我的代码：

    Next.setOnClickListener(new View.OnClickListener() {
            ViewFlipper flipp = (ViewFlipper) findViewById(R.id.flipp);
        @Override
        public void onClick(View view) {

            if(flipp.getDisplayedChild() == 0){if(qOne.isChecked()) {CorrectToast();}else{WrongToast();}} 
            if(flipp.getDisplayedChild() == 1){if(qTwo.isChecked()){CorrectToast();}else{WrongToast();}}
            if(flipp.getDisplayedChild() == 2){if(qThree.isChecked()){CorrectToast();}else{WrongToast();}}
            if(flipp.getDisplayedChild() == 3){if(qFour.isChecked()){CorrectToast();}else{WrongToast();}}
        }
    });

Answer 1

请改用switch语句：

Next.setOnClickListener(new View.OnClickListener() {
        ViewFlipper flipp = (ViewFlipper) findViewById(R.id.flipp);
    @Override
    public void onClick(View view) {
        switch(flipp.getDisplayedChild()) {
            case 0: if(qOne.isChecked()) {CorrectToast();}else{WrongToast();} break; 
            case 1: if(qTwo.isChecked()) {CorrectToast();}else{WrongToast();} break;
            case 2: if(qThree.isChecked()) {CorrectToast();}else{WrongToast();} break;
            case 3: if(qFour.isChecked()) {CorrectToast();}else{WrongToast();} break;
            default: break; //do default action,
        }
    }  

Answer 2

使用if () else if ()构造

Answer 3

您可以像这样使用if() { } else if() { }语句

    Next.setOnClickListener(new View.OnClickListener() {
            ViewFlipper flipp = (ViewFlipper) findViewById(R.id.flipp);
        @Override
        public void onClick(View view) {

            if(flipp.getDisplayedChild() == 0){if(qOne.isChecked()) {CorrectToast();}else{WrongToast();}} 
            else if(flipp.getDisplayedChild() == 1){if(qTwo.isChecked()){CorrectToast();}else{WrongToast();}}
            else if(flipp.getDisplayedChild() == 2){if(qThree.isChecked()){CorrectToast();}else{WrongToast();}}
            else if(flipp.getDisplayedChild() == 3){if(qFour.isChecked()){CorrectToast();}else{WrongToast();}}
        }
    });

Answer 4

swith声明没问题，但我建议这样做。 它更具可读性，你可以添加更少的文章和混乱的对象。

public void onClick(View view) {
    CheckedObject[] objectsToCheck = new CheckedObject[]{qOne,qTwo,qThree,qFour};
    int index = flipp.getDisplayedChild();
    if (objectsToCheck[index].isChecked())
    {
         CorrectToast();
    }
    else 
    {
         WrongToast();
    }
}