Question

我正在编写程序以使用edittext获取用户输入并将textview转换为显示该文本。

输入是数字，我已经正确地将String转换为整数值，唯一的问题是我必须使用try catch块来捕获数字格式错误。问题是我必须在try catch块中包含用于将TextView设置为输入的按钮，以便按钮知道用户设置的值是什么。

try{

     EditText hour = (EditText) findViewById(R.id.hourin);

     EditText  min = (EditText) findViewById(R.id.minin);

     final TextView FinalTime = (TextView) findViewById (R.id.FinalTimeDisplay);


     String hoursString = hour.getText().toString();
     String minsString = min.getText().toString();


     int hours = Integer.parseInt(hoursString);
     int mins = Integer.parseInt(minsString);


    final String time = (hours + ":" + mins);

    Button Submit = (Button) findViewById(R.id.submit);
    Submit.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {


               FinalTime.setText(time);

        }
    });

    } catch (NumberFormatException e){

    }

Answer 1

          Button Submit = (Button) findViewById(R.id.button1);
          Submit.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                try {

                    int hours = 0;
                    int mins = 0;
                    int breaktimes = 0;

                    hours = Integer.parseInt(hour.getText().toString());
                    mins = Integer.parseInt(min.getText().toString());
                    breaktimes = Integer.parseInt(breaktime.getText().toString());  

                    mins = (mins + breaktimes);
                    if (mins >= 60){
                        hours = hours + 1;
                        mins = mins - 60;
                    }

                    if (hours > 12){
                        hours = hours - 12;
                    } 


                if (mins < 10){ 
               FinalTime.setText(hours +":" +"0"+ mins);
                }else{
                    FinalTime.setText(hours + ":" +mins);
                }
            }catch (NumberFormatException e){

            }
        }

    });

Answer 2

也许，您需要在public void onClick()顶部添加 @Override 装饰器？！

@Override
public void onClick(View v) {
    FinalTime.setText(time);
}

Android，Button在Try Catch块中无法运行

2 个答案: