检查值是否在一系列数字之间

我试图检查文本框中的值是否在4到80之间,但我不能这样做,但它不是我需要的

 final String checkage = age.getText().toString();
    if(checkage.equals(4)   || checkage.equals(80) ) {
        Toast.makeText(this, "You must be older than 4 and younger than 80", Toast.LENGTH_SHORT).show();
        return;
}

Mohammed Aou.. 5

用这个:

final String checkage = age.getText().toString();
int value = Integer.parseInt(checkage);

if(value >= 4 && value <= 80) {
      Toast.makeText(this, "You must be older than 4 and younger than 80", Toast.LENGTH_SHORT).show();
      return;
}

' || 在这种情况下,'对你没用.

用这个:

final String checkage = age.getText().toString();
int value = Integer.parseInt(checkage);

if(value >= 4 && value <= 80) {
      Toast.makeText(this, "You must be older than 4 and younger than 80", Toast.LENGTH_SHORT).show();
      return;
}

' || 在这种情况下,'对你没用.