How to consider an empty Edittext as "0"

Question

I’m developing an Android app that calculates 3x3 matrices
so I’m 18 EditText, however if I want to multiply a matrix 2x3, 2x2, 1x2, etc. I would have to fill the fields of the matrix size and leave the other fields with 0 and this would not change the result.

I made a condition for him to warn if the field is empty but the best thing would be for him to consider the empty field as "0" without needing the user to fill in all fields

Answer 1

This can easily be achieved by declaring your Edittext with its default value equal to zero and indicate that it can only receive numerical values:

<EditText
   android:id="@+id/edittext"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="0" 
   android:inputType="number"/>

The attribute android:text="0" sets zero as default.
The attribute android:inputType="number" only integers are accepted by Edittext

Answer 2

To get the value of your EditText use this function by passing it as parameter

private int getValorEdit(EditText edit){

    int ret = 0;

    if (! edit.getText().toString().equalsIgnoreCase("")) {
        ret = Integer.valueOf(edit.getText().toString());
    }   
    return ret;

}

Hope to help you.

Answer 3

None of the above corrections worked for me. Only this:

if(txtEdit.getText().toString().equals("")){
  num = 0;
} else {
  num = parseInt(txtEdit.getText().toString());
}