ADD week 5

02-Easy5/E5/sources/com/google/android/material/animation/ChildrenAlphaProperty.java

@@ -0,0 +1,30 @@
+package com.google.android.material.animation;
+
+import android.util.Property;
+import android.view.ViewGroup;
+import com.google.android.material.R;
+
+/* loaded from: classes.dex */
+public class ChildrenAlphaProperty extends Property<ViewGroup, Float> {
+    public static final Property<ViewGroup, Float> CHILDREN_ALPHA = new ChildrenAlphaProperty("childrenAlpha");
+
+    private ChildrenAlphaProperty(String str) {
+        super(Float.class, str);
+    }
+
+    @Override // android.util.Property
+    public Float get(ViewGroup viewGroup) {
+        Float f = (Float) viewGroup.getTag(R.id.mtrl_internal_children_alpha_tag);
+        return f != null ? f : Float.valueOf(1.0f);
+    }
+
+    @Override // android.util.Property
+    public void set(ViewGroup viewGroup, Float f) {
+        float floatValue = f.floatValue();
+        viewGroup.setTag(R.id.mtrl_internal_children_alpha_tag, Float.valueOf(floatValue));
+        int childCount = viewGroup.getChildCount();
+        for (int i = 0; i < childCount; i++) {
+            viewGroup.getChildAt(i).setAlpha(floatValue);
+        }
+    }
+}