在android中输入第一个字符后立即输入字符 [英] Enter character immediately after entering first character in android

问题描述

我有一个editText和inputType作为电话号码.输入第一个数字后，我想立即添加特定的区号.例如说

I am having a editText and inputType as phone number. I would like add specific area code immediately after I enter first digit. Say for example

我输入6，EditText应该显示为+16.

I enter 6 the EditText should show up +1 6.

我正在尝试使用textWatcher实现此目的，但不确定如何将输入的数字放在"+1"之后

I am trying achieve this using textWatcher but not sure how to put the number that I type after "+1"

   public void afterTextChanged(Editable s) 
            {               
                if(s.length() == 1)
                {
                    numberText.settext("+1");
                    numberText.setSelection(numberText.getText().length());
                }
            }

但是这里的问题是，当我输入第一个数字时，会填充+1，但不会显示通过键盘键入的数字.我不确定这里出什么问题了吗?

But the problem here is that when I enter first number the +1 is populated but the number which type through keyboard is not getting shown. I am not sure what is wrong here?

当我退格并从文本中删除1时，也会发生这种情况，但是我无法删除+(这会自动填充).当我在填充+1后退格时，我不想删除+1.

Also when I backspace and remove 1 from the text this happens but I am not able to remove + (this populates automatically). I don't want to remove +1 when I back space after +1 is populated.

有可能吗?

谢谢！

推荐答案

要输入+1之后的下一个字符，您应该使用:

For input the next character after the +1 you should use :

numberText.settext("+1" + s.toString());

要向后退+1，您需要keyListener :(不适用于软键盘)

For backspace the +1 you need keyListener : (not worked with soft keyboard)

numberText.setOnKeyListener(new OnKeyListener() {                 
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            //You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
             if(keyCode == KeyEvent.KEYCODE_DEL){  
                 //this is for backspace
                 String text = numberText.getText().toString();
                 if(text.equals("+1")) 
                   return false; 
             }      
        }
    });

编辑
尝试破解方法:

EDIT
Trying to hack approach :

public void afterTextChanged(Editable s) 
{               
  if(s.length() == 0 || s.toString().equals("+"))
  {
    numberText.settext("+1");
  }
  else if(s.length() == 1)
  {
    numberText.settext("+1"+s.toString());
    numberText.setSelection(numberText.getText().length());
  }
}

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