Android-About confirmation detection of character input

Question: Question:

Good evening.

I'm thinking of detecting the end of input of EditText by detecting the confirmation. I found the following code in the search.

edit1.addTextChangedListener(new TextWatcher()
{
        int currentLength = 0;

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

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        currentLength = s.toString().length();
    }

    @Override
    public void afterTextChanged(Editable s) {
        Log.v("", "after:" + s.toString());
        if (s.toString().length() < currentLength) {
            return;
        }
        boolean unfixed = false;
        Object[] spanned = s.getSpans(0, s.length(), Object.class);
        if (spanned != null) {
            for (Object obj : spanned) {
                if (obj instanceof android.text.style.UnderlineSpan) {
                    unfixed = true;
                }
            }
        }
        if (!unfixed) {
            Toast toast = Toast.makeText(getApplicationContext(), "確定", Toast.LENGTH_SHORT);
            toast.show();
        }
    }
});

It works fine, but it also happens when I press the Delete key on the soft keyboard after confirming.

Is there a way to prevent this?

Thank you.

Answer: Answer:

As a result of investigation, it seems that the count of onTextChanged(CharSequence s, int start, int before, int count) becomes 0 when the Delete key of the soft keyboard is input.

So I did the following:

edit1.addTextChangedListener(new TextWatcher() {

    boolean keycodeFlag = false; // 上記コードに追加

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

        // このブロック追加
        if (count == 0) {
            keycodeFlag = true;
        }
    }

    @Override
    public void afterTextChanged(Editable s) {

        if (s.toString().length() < currentLength || keycodeFlag) {   // 変更
            keycodeFlag = false;  // 追加
            return;
        }
    }
}

Now you can prevent the Delete key in your question from being detected as confirmed.
(Confirmed with Android 4.2.2, 4.4.4, 5.0 on Genymotion emulator)