I'm using TextWatcher to do other persistencies, but I caught on this part, I'm getting a value double and using it for several calculations so I can not get the value ".55" for example.
If I did not have to do calculations, Android would put 0 before the point automatically for me. Does anyone know how to solve this problem?
If you are doing calculations with double , then by default, numbers with . in the front are accepted and do not hamper calculation. But if you want to ban the use of "." before a number you can use regular expressions .
Try to use BigDecimal for mathematical calculations. Besides working with precision, it has a good interaction with views.
Try this:
String strValue = myTextView.getText().toString();
BigDecimal decimalValue = new BigDecimal(valueStr.replace('.', ','));
If you tell the data type in the editText xml can solve your problem?
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"/>