Android – lets textinputlayout display a prompt only after the first character is typed

Previously, to use floating tags before supporting libraries, I used the following third-party libraries from Chris banes

https://gist.github.com/chrisbanes/11247418

The library is perfect for me because the floating prompt is displayed only after the first character is entered

Before typing, there is focus

After typing, there is focus

This is the code used

<org.yccheok.portfolio.FloatLabelLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    app:floatLabelTextAppearance="@style/PortfolioFloatLabel">
    <EditText
        android:id="@+id/unit_edit_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/new_buy_portfolio_unit"
        android:singleLine="true"
        android:inputType="numberDecimal"
        android:imeOptions="actionNext|flagNoExtractUi">
        <requestFocus />
    </EditText>
</org.yccheok.portfolio.FloatLabelLayout>

I decided to migrate to Google design support library for better support

<android.support.design.widget.TextInputLayout
    android:id="@+id/usernameWrapper"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp">
    <EditText
        android:id="@+id/unit_edit_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/new_buy_portfolio_unit"
        android:singleLine="true"
        android:inputType="numberDecimal"
        android:imeOptions="actionNext|flagNoExtractUi">
        <requestFocus />
    </EditText>
</android.support.design.widget.TextInputLayout>

However, after you follow EditText, the floating prompt is displayed immediately even before you type the first character

I wonder if there is any way to display the floating prompt. There is at least one input character in EditText?

resolvent:

You may want to implement textwatcher and manually set the focus to the desired text length