In Android EditText, how to force writing uppercase?

Question

In my Android application I have different EditText where the user can enter information. But I need to force user to write in uppercase letters. Do you know a

Answer 1

Rather than worry about dealing with the keyboard, why not just accept any input, lowercase or uppercase and convert the string to uppercase?

The following code should help:

EditText edit = (EditText)findViewById(R.id.myEditText);
String input;
....
input = edit.getText();
input = input.toUpperCase(); //converts the string to uppercase

This is user-friendly since it is unnecessary for the user to know that you need the string in uppercase. Hope this helps.

Answer 2

In kotlin, in .kt file make changes:

edit_text.filters = edit_text.filters + InputFilter.AllCaps()

Use synthetic property for direct access of widget with id. And in XML, for your edit text add a couple of more flag as:

<EditText
    android:id="@+id/edit_text_qr_code"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    ...other attributes...
    android:textAllCaps="true"
    android:inputType="textCapCharacters"
    />

This will update the keyboard as upper case enabled.

Answer 3

Set the input type to TYPE_CLASS_TEXT| TYPE_TEXT_FLAG_CAP_CHARACTERS. The keyboard should honor that.

Answer 4

Xamarin equivalent of ErlVolton's answer:

editText.SetFilters(editText.GetFilters().Append(new InputFilterAllCaps()).ToArray());

Answer 5

If you want to force user to write in uppercase letters by default in your EditText, you just need to add android:inputType="textCapCharacters". (User can still manually change to lowercase.)

Answer 6

You can used two way.

First Way:

Set android:inputType="textCapSentences" on your EditText.

Second Way:

When user enter the number you have to used text watcher and change small to capital letter.

edittext.addTextChangedListener(new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {            

    }
        @Override
    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {             
    }
    @Override
    public void afterTextChanged(Editable et) {
          String s=et.toString();
      if(!s.equals(s.toUpperCase()))
      {
         s=s.toUpperCase();
         edittext.setText(s);
         edittext.setSelection(edittext.length()); //fix reverse texting
      }
    }
});