android:按纽按压效果

一，代码：

press_rounded_corner.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="false">
        <shape>
            <solid android:color="#006400" />
            <corners android:radius="10dp" />
        </shape>
    </item>

    <item android:state_pressed="true">
        <shape>
            <solid android:color="#32CD32" />
            <corners android:radius="15dp" />
            <stroke
                android:width="2dp"
                android:color="#006400" />
        </shape>
    </item>

</selector>

调用:

   <Button
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:background="@drawable/press_rounded_corner"
        android:textColor="#ffffff"
        app:layout_constraintTop_toBottomOf="@id/c_view1"
        app:layout_constraintStart_toStartOf="@id/c_view1"
        app:layout_constraintEnd_toStartOf="@id/btn_qk"
        android:layout_marginStart="5dp"
        android:layout_marginEnd="5dp"
        android:layout_marginTop="5dp"
        android:textSize="40sp"
        android:id="@+id/btn_ht"
        android:text="回退" />
    <Button
        android:id="@+id/btn_qk"
        android:layout_height="0dp"
        android:layout_width="0dp"
        android:background="@drawable/press_rounded_corner"
        android:textColor="#ffffff"
        app:layout_constraintEnd_toEndOf="@id/c_view1"
        app:layout_constraintStart_toEndOf="@id/btn_ht"
        app:layout_constraintTop_toBottomOf="@id/c_view1"
        app:layout_constraintBottom_toBottomOf="@id/btn_ht"
        android:layout_marginStart="5dp"
        android:layout_marginEnd="5dp"
        android:layout_marginTop="5dp"
        android:textSize="40sp"
        android:text="清空" />

二，测试效果: