升级sdk版本，解决版本太低在高版本Android设备上无法安装问题。更新签名文件

app/build.gradle

@@ -2,17 +2,34 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 30
-    buildToolsVersion '25.0.0'
+    buildToolsVersion '30.0.2'
 
     defaultConfig {
         applicationId "com.inuker.bluetooth"
-        minSdkVersion 21
-        targetSdkVersion 21
-        versionCode 1
-        versionName "1.0"
+        minSdkVersion 24
+        targetSdkVersion 30
+        versionCode 2
+        versionName "2.0"
     }
+
+    signingConfigs {
+        release {
+            storeFile file("keystore/rk3128.jks")
+            storePassword "111111"
+            keyAlias "rk3128"
+            keyPassword "111111"
+        }
+    }
+
     buildTypes {
         release {
+            signingConfig signingConfigs.release
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+
+        debug {
+            signingConfig signingConfigs.release
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }

build.gradle

@@ -2,10 +2,17 @@
 
 buildscript {
     repositories {
-        jcenter()
+        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
+        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter'}
+        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
+
+        //jcenter()
+        mavenCentral()
+        google()
     }
+
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.0'
+        classpath 'com.android.tools.build:gradle:4.2.2'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
 //        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
 
@@ -16,7 +23,13 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
+        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
+        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter'}
+        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
+
+        //jcenter()
+        mavenCentral()
+        google()
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Sat Mar 18 16:27:35 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.4.1-all.zip