Question

嗨，我在几乎完整的程序中遇到了一个大问题，我无法将我的字符串转换为整数并将其进一步累加。我知道这很容易，并且可以使用public class SMSService extends Service { private PowerManager.WakeLock mWakeLock = null; private boolean skip = true; SmsManager mSmsManager; @Override public IBinder onBind(Intent intent) { return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { mSmsManager = SmsManager.getDefault(); SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE); mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); mWakeLock.acquire(); timer(minutes, true); if (Build.VERSION.SDK_INT >= 26) { Intent notificationIntent = new Intent(this, MainActivity.class); PendingIntent mPendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); Notification mNotification = new NotificationCompat.Builder(this, CHANNEL_ID) .setContentTitle(getString(R.string.notification_title)) .setContentText(getString(R.string.notification_text)) .setSmallIcon(R.drawable.ic_local) .setContentIntent(mPendingIntent) .build(); startForeground(1, mNotification); } return START_NOT_STICKY; } void timer(final int minutes, final boolean close) { CountDownTimer cdt = new CountDownTimer(minutes * 60 * 1000 + 15000, minutes * 60 * 1000) { @Override public void onTick(long millisUntilFinished) { if (!skip) { mSmsManager.sendTextMessage(number, null, sms_body, null, null); } skip = false; } @Override public void onFinish() { if (!close) { skip = true; timer(minutes, true); } else { stopSelf(); } } }; cdt.start(); } }和parsetInt()来完成，但是这让我头疼。请kndliy查看我的代码并帮助我，这样我就不会{{1} }

代码在这里：

number()

谢谢...

Answer 1

function myFunction(){
var operator = document.getElementById("operator").value;
    var Quantity = document.getElementById("quantity").value;
if(operator.trim().length&&Quantity.trim().length){

    var GetQuantity = Number(Quantity);
    var testing = parseInt(GetQuantity);

    if(operator == '+') {
        testing = testing + 1;
    }
    else {
        testing = testing - 1;
    }
    alert(testing);

    document.getElementById("result").innerHTML=testing; 
    } else {
     document.getElementById("result").innerHTML="<b style='color:"+ 
     "red;'>Please enter an operator and a quantity!</b>";
   }
}

<html>
<head>
</head>
<body>
<label>
Operator: 
<input type="text" id="operator"/>
</label>
<br/>
<label>
Quantity: 
<input type="text" id="quantity"/>
</label>
<br/>
<button onClick="myFunction()">
Do The Math
</button>
<br/>
Result:
<br/>
<span id="result"></span>
</body>
</html>

如何将字符串转换为整数

1 个答案: