How to change the focus to next edit text in android?

Question

The User can enter only one digit in the edit text. if he enters the value in

Answer 1

You can use use a hidden EditText receive input, four TextView to display the password.

example:

dialog_passworld.xml

PasswordDialogBuilder.java

public class PasswordDialogBuilder extends AlertDialog.Builder {

    public PasswordDialogBuilder(Context context) {
        super(context, displayMetrics, eventManager);

        View contentView = LayoutInflater.from(context).inflate(R.layout.dialog_password, null);

        LinearLayout passcodeContainer = (LinearLayout) contentView.findViewById(R.id.passcode_container);

        final List passwordViews = new ArrayList();

        int childCount = passcodeContainer.getChildCount();
        for (int i = 0; i < childCount; i++) {
            View childView = passcodeContainer.getChildAt(i);
            if (childView instanceof TextView) {
                passwordViews.add((TextView) childView);
            }
        }

        final int passwordCount = passwordViews.size();

        EditText passwordView = (EditText) contentView.findViewById(R.id.passcode);
        passwordView.setFilters(new InputFilter[] {new InputFilter.LengthFilter(passwordCount)});
        passwordView.setInputType(EditorInfo.TYPE_CLASS_NUMBER);
        passwordView.setCursorVisible(false);
        passwordView.setTextColor(Color.TRANSPARENT);
        passwordView.setBackgroundColor(Color.TRANSPARENT);
        passwordView.setSingleLine();

        passwordView.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {}

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            @Override
            public void afterTextChanged(Editable s) {
                int passwordLength = s.length();

                for (int i = 0; i < passwordCount; i++) {
                    TextView passcodeView = passwordViews.get(i);
                    if (i < passwordLength) {
                        passcodeView.setText(String.valueOf(s.charAt(i)));
                    } else {
                        passcodeView.setText(StringUtils.EMPTY);
                    }
                }

                if (positiveButton != null) {
                    positiveButton.setEnabled(passwordLength == passwordCount);
                }
            }
        });

        setView(contentView);
    }
}