IssueTracker

• Component used: androidx.appcompat:appcompat
• Version used: 1.4.0
• Devices/Android versions reproduced on: Pixel 5/Android 12

If this is a bug in the library, we would appreciate if you could attach:

• Class : androidx.emoji.widget.EmojiEditTextHelper
• Sample Code

public class TestEditText extends AppCompatEditText {
    private final List<TextWatcher> watchers = new ArrayList<>();

    public TestEditText(@NonNull Context context) {
        super(context);
    }

    public TestEditText(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public TestEditText(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void addTextChangedListener(TextWatcher watcher) {
        super.addTextChangedListener(watcher);
        /*
        watchers is null when run here and crash because NullPointerException.
        this root case is the addition of EmojiEditTextHelper in the appcompat package of 1.4.0.
        which will call addTextChangeListener in the construct method.but the subclass initialization logic
        has not yet been executed 
        * */
        watchers.add(watcher);
    }
}

• My Suggestion

HelperInternal19(@NonNull EditText editText) {
            mEditText = editText;
            mTextWatcher = new EmojiTextWatcher(mEditText);
            mEditText.addTextChangedListener(mTextWatcher); // lazy run this.such as post in ui thread
            mEditText.setEditableFactory(EmojiEditableFactory.getInstance());
        }

• My Email: hang.wang@shopee.com