1.优化代码

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

@@ -19,8 +19,8 @@
             android:background="@drawable/bg_login"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintHorizontal_weight="1"
-            app:layout_constraintLeft_toLeftOf="parent"
-            app:layout_constraintRight_toLeftOf="@id/loginLayout"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toStartOf="@id/loginLayout"
             app:layout_constraintTop_toTopOf="parent">
 
             <androidx.appcompat.widget.AppCompatImageView
@@ -29,8 +29,8 @@
                 android:layout_height="wrap_content"
                 android:background="@mipmap/icon_login"
                 app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintLeft_toLeftOf="parent"
-                app:layout_constraintRight_toRightOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="parent" />
 
             <androidx.appcompat.widget.AppCompatTextView
@@ -41,8 +41,8 @@
                 android:textColor="@android:color/white"
                 android:textSize="@dimen/divider_32px"
                 android:textStyle="bold"
-                app:layout_constraintLeft_toLeftOf="parent"
-                app:layout_constraintRight_toRightOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/appImage" />
 
         </androidx.constraintlayout.widget.ConstraintLayout>
@@ -54,8 +54,8 @@
             android:background="@android:color/white"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintHorizontal_weight="1"
-            app:layout_constraintLeft_toRightOf="@id/imageLayout"
-            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintStart_toEndOf="@id/imageLayout"
+            app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent">
 
             <androidx.appcompat.widget.AppCompatTextView
@@ -68,8 +68,8 @@
                 android:textColor="@color/color_FF343434"
                 android:textSize="@dimen/divider_42px"
                 android:textStyle="bold"
-                app:layout_constraintLeft_toLeftOf="parent"
-                app:layout_constraintRight_toRightOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="parent" />
 
             <androidx.appcompat.widget.AppCompatEditText