11

android/app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
   package="com.fenghua_student_client">
 
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
+      tools:replace="android:allowBackup"
       android:name=".MainApplication"
       android:label="@string/app_name"
       android:icon="@mipmap/ic_launcher"

android/build.gradle

@@ -2,17 +2,21 @@
 
 buildscript {
     ext {
-        buildToolsVersion = "29.0.2"
-        minSdkVersion = 16
+         buildToolsVersion = "29.0.3"
+        minSdkVersion = 21
         compileSdkVersion = 29
         targetSdkVersion = 29
+        ndkVersion = "20.1.5948944"
     }
     repositories {
+        maven { url 'https://maven.aliyun.com/repository/public' }
+        maven { url 'https://maven.aliyun.com/repository/google' }
+        maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }
         google()
         jcenter()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:3.5.3")
+        classpath("com.android.tools.build:gradle:4.1.0")
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -32,6 +36,9 @@ allprojects {
        
         google()
         jcenter()
+        maven { url 'https://maven.aliyun.com/repository/public' }
+        maven { url 'https://maven.aliyun.com/repository/google' }
+        maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }
         maven { url 'https://www.jitpack.io' }
     }
 }

android/gradle/wrapper/gradle-wrapper.properties

 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
+# distributionUrl=file:///C:/Users/zkx/Downloads/gradle-6.2-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists