使用正則表達式在Android中驗證電話號碼

Question

無法使用正則表達式來驗證電話號碼。我只想讓數字和連字符，但到目前爲止，我一直試圖讓數字工作。不幸的是，儘管在瀏覽Google和Stack Overflow之後發生了不同的變化，但正則表達式仍然被認爲是錯誤的。理想情況下，字符串（如8889990000或888-999-3333）都應評估爲真。任何幫助表示讚賞！對於正則表達式

Main類代碼：

boolean correct = PhoneFilter.filterPhone(phone_num); 

if (correct == true) { 
    //create an intent to carry data from main activity to OrderConfirmationActivity 
    Intent intent = new Intent(MainActivity.this, OrderConfirmationActivity.class); 

    //pack pizza order data into intent 
    intent.putExtra("nameSelected", nameEditText.getText().toString()); 
    intent.putExtra("aVariable", type); 
    intent.putExtra("mtSelected", mt); 
    intent.putExtra("otSelected", ot); 
    intent.putExtra("ptSelected", pt); 
    intent.putExtra("dateSelected", Date); 

    //start the OrderConfirmationActivity 
    startActivity(intent); 


} 
     //alert user if phone number entered incorrectly 
else if (correct == false) { 
    AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create(); 
    alertDialog.setTitle("Alert"); 
    alertDialog.setMessage("Please enter a phone number in either 000-0000-000 format or 0000000000 format"); 
    alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK", 
      new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        dialog.dismiss(); 
       } 
      }); 
    alertDialog.show(); 
} 

爲filterPhone的代碼是：

public class PhoneFilter { 

    public static boolean filterPhone(String phone_text) { 
     boolean correct; 

     if ((phone_text.length() <= 12) && (phone_text.matches("[0-9]+"))) 
      correct = true; 
     else 
      correct = false; 

     System.out.println("correct =" + correct); 
     return correct; 

     //InputFilter lengthFilter = new InputFilter.LengthFilter(12); 
    } 
} 

Answer 1

嘗試切換

phone_text.matches("[0-9]+") 

到

phone_text.matches("^[0-9-]+$") 

我把一個快速測試嘗試一下：

public static void main(String[] args) { 
    //Sysout for example only 
    System.out.println(filterPhone("8889990000")); 
    System.out.println(filterPhone("888-999-3333")); 
    System.out.println(filterPhone("888B999A3333")); 
    System.out.println(filterPhone("")); 
} 

public static boolean filterPhone(String phone_text) { 
    boolean correct; 

    if ((phone_text.length() <= 12) && (phone_text.matches("^[0-9-]+$"))) 
     correct = true; 
    else 
     correct = false; 

    System.out.println("correct =" + correct); 
    return correct; 

    // InputFilter lengthFilter = new InputFilter.LengthFilter(12); 
} 

產地：

correct =true 
true 
correct =true 
true 
correct =false 
false 
correct =false