给出无效的电话号码时,sendTextMessage()会引发NullPointerException

时间:2012-10-26 04:05:54

标签: java android sms

我在尝试向无效号码发送短信时遇到NullPointerException(无效我的意思是包含字母字符等的电话号码,而不是服务中断号码)

我使用的代码来自本教程: http://mobiforge.com/developing/story/sms-messaging-android

//---sends an SMS message to another device---
private void sendSMS(String phoneNumber, String message)
{        
    String SENT = "SMS_SENT";
    String DELIVERED = "SMS_DELIVERED";

    PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
        new Intent(SENT), 0);

    PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
        new Intent(DELIVERED), 0);

    //---when the SMS has been sent---
    registerReceiver(new BroadcastReceiver(){
        @Override
        public void onReceive(Context arg0, Intent arg1) {
            switch (getResultCode())
            {
                case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS sent", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                    Toast.makeText(getBaseContext(), "Generic failure", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NO_SERVICE:
                    Toast.makeText(getBaseContext(), "No service", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NULL_PDU:
                    Toast.makeText(getBaseContext(), "Null PDU", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_RADIO_OFF:
                    Toast.makeText(getBaseContext(), "Radio off", 
                            Toast.LENGTH_SHORT).show();
                    break;
            }
        }
    }, new IntentFilter(SENT));

    //---when the SMS has been delivered---
    registerReceiver(new BroadcastReceiver(){
        @Override
        public void onReceive(Context arg0, Intent arg1) {
            switch (getResultCode())
            {
                case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS delivered", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case Activity.RESULT_CANCELED:
                    Toast.makeText(getBaseContext(), "SMS not delivered", 
                            Toast.LENGTH_SHORT).show();
                    break;                        
            }
        }
    }, new IntentFilter(DELIVERED));        

    SmsManager sms = SmsManager.getDefault();
    sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);        
}

当用户碰巧输入无效的电话号码时,应用程序崩溃并不是最好的。所以我的问题是处理这个问题的好方法是什么?

我可以从这段代码中捕获NullPointerExceptions然后引发错误toast,但似乎NullPointerException也会引发其他错误,例如如果消息太长而且应该是多部分的。

另一种愚蠢的方法是限制EditText只接受数字和'+'字符。

我对这些解决方案中的任何一个都不满意 - 在我看来,理想情况下,sendTextMessage方法应该引发更多信息性异常或为此广播错误代码?

1 个答案:

答案 0 :(得分:0)

将edittext的输入类型设置为电话号码效果很好。通过“电话号码”输入小部件输入的任何数字组合似乎都不会引发异常(例如“#*,()123”)

在XML中:

android:inputType="phone"

感谢awadm指出我正确的方向