Click Effect on Android Button

Question

Hello people I have the following situation;

boot selected.xml

    <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#DBDBDB" />
    <corners android:radius="14dp" />
    <stroke
        android:width="1dp"
        android:color="#DBDBDB" />
</shape>

boot.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#F2F2F2" />
    <corners android:radius="14dp" />


    <stroke
        android:width="1dp"
        android:color="#DBDBDB" />
</shape>

boot.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/botao_selecionado" android:state_pressed="true" /> <!-- pressionado -->
    <item android:drawable="@drawable/botao_selecionado" android:state_focused="true" /> <!-- com foco -->
    <item android:drawable="@drawable/botao_normal" /> <!-- normal-->
</selector>

I put.xml as background:

android:background="@drawable/botao"

Blz tested on my android 9 pie is ok, when I went to test on android 4.3 he didn’t even open the project: Dis that the project stopped, what will be this?