1.修改button背景。

app/src/main/res/layout/activity_login.xml

                     android:layout_width="wrap_content"
                     android:layout_height="37dp"
                     android:src="@drawable/ic_manageapp_launcher"
+                    app:layout_constraintHorizontal_chainStyle="packed"
                     app:layout_constraintLeft_toLeftOf="parent"
                     app:layout_constraintRight_toLeftOf="@id/logo_tv"
-                    app:layout_constraintHorizontal_chainStyle="packed"
                     app:layout_constraintTop_toTopOf="parent" />
 
                 <TextView
                     app:layout_constraintRight_toRightOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/code_et" />
 
-                <Button
+                <FrameLayout
                     android:id="@+id/login_btn"
                     android:layout_width="387dp"
                     android:layout_height="49dp"
                     android:layout_marginTop="279dp"
-                    android:background="@drawable/icon_login"
-                    android:text="@string/loginnow"
-                    android:textColor="@color/white"
-                    android:textSize="21sp"
                     app:layout_constraintLeft_toLeftOf="parent"
                     app:layout_constraintRight_toRightOf="parent"
-                    app:layout_constraintTop_toTopOf="parent" />
+                    app:layout_constraintTop_toTopOf="parent">
+
+                    <com.makeramen.roundedimageview.RoundedImageView
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:src="@drawable/icon_login"
+                        app:riv_corner_radius_bottom_left="12dp"
+                        app:riv_corner_radius_bottom_right="12dp"
+                        app:riv_corner_radius_top_left="12dp"
+                        app:riv_corner_radius_top_right="12dp" />
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:gravity="center"
+                        android:text="@string/loginnow"
+                        android:textColor="@color/white"
+                        android:textSize="21sp" />
+                </FrameLayout>
             </androidx.constraintlayout.widget.ConstraintLayout>
         </androidx.core.widget.NestedScrollView>
 
         android:background="@drawable/main_bg"
         android:gravity="center_horizontal"
         android:orientation="vertical"
-        android:visibility="gone"
-        >
+        android:visibility="gone">
 
         <ImageView
             android:layout_width="157dp"

app/src/main/res/layout/layout_notice_dialog.xml

             </androidx.appcompat.widget.LinearLayoutCompat>
         </androidx.core.widget.NestedScrollView>
 
-        <Button
-            android:id="@+id/dialog_close_btn"
+        <!-- <Button
+             android:id="@+id/dialog_close_btn"
+             android:layout_width="350dp"
+             android:layout_height="49dp"
+             android:layout_marginBottom="10dp"
+             android:background="@drawable/icon_login"
+             android:text="@string/close"
+             android:textColor="@color/white" />-->
+        <FrameLayout
             android:layout_width="350dp"
             android:layout_height="49dp"
-            android:layout_marginBottom="10dp"
-            android:background="@drawable/icon_login"
-            android:text="@string/close"
-            android:textColor="@color/white" />
+            android:layout_marginBottom="10dp">
+
+            <com.makeramen.roundedimageview.RoundedImageView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:src="@drawable/icon_login"
+                app:riv_corner_radius_bottom_left="12dp"
+                app:riv_corner_radius_bottom_right="12dp"
+                app:riv_corner_radius_top_left="12dp"
+                app:riv_corner_radius_top_right="12dp" />
+
+            <Button
+                android:id="@+id/dialog_close_btn"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="#00000000"
+                android:gravity="center"
+                android:text="@string/close"
+                android:textColor="@color/white"
+                android:textSize="18sp" />
+        </FrameLayout>
     </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/layout_sys_notice_dialog.xml

             </androidx.appcompat.widget.LinearLayoutCompat>
         </androidx.core.widget.NestedScrollView>
 
-        <Button
+    <!--    <Button
             android:id="@+id/dialog_close_btn"
             android:layout_width="350dp"
             android:layout_height="49dp"
             android:layout_marginBottom="10dp"
             android:background="@drawable/icon_login"
             android:text="@string/close"
-            android:textColor="@color/white" />
+            android:textColor="@color/white" />-->
+        <FrameLayout
+            android:layout_width="350dp"
+            android:layout_height="49dp"
+            android:layout_marginBottom="10dp">
+
+            <com.makeramen.roundedimageview.RoundedImageView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:src="@drawable/icon_login"
+                app:riv_corner_radius_bottom_left="12dp"
+                app:riv_corner_radius_bottom_right="12dp"
+                app:riv_corner_radius_top_left="12dp"
+                app:riv_corner_radius_top_right="12dp" />
+
+            <Button
+                android:id="@+id/dialog_close_btn"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="#00000000"
+                android:gravity="center"
+                android:text="@string/close"
+                android:textColor="@color/white"
+                android:textSize="18sp" />
+        </FrameLayout>
     </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>