抽离公共依赖

app/build.gradle

@@ -1,13 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion "30.0.3"
+    compileSdkVersion rootProject.ext.android.compileSdkVersion
 
     defaultConfig {
         applicationId "com.mogo.cloud"
-        minSdkVersion 19
-        targetSdkVersion 30
+        minSdkVersion rootProject.ext.android.minSdkVersion
+        targetSdkVersion rootProject.ext.android.targetSdkVersion
         versionCode 1
         versionName "1.0"
 
@@ -24,10 +23,8 @@ android {
 
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation rootProject.ext.dependencies.androidxappcompat
+    implementation rootProject.ext.dependencies.androidxconstraintlayout
+
 
 }

app/src/androidTest/java/com/mogo/cloud/ExampleInstrumentedTest.java

@@ -1,26 +0,0 @@
-package com.mogo.cloud;
-
-import android.content.Context;
-
-import androidx.test.platform.app.InstrumentationRegistry;
-import androidx.test.ext.junit.runners.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-        assertEquals("com.mogo.cloud", appContext.getPackageName());
-    }
-}

app/src/test/java/com/mogo/cloud/ExampleUnitTest.java

@@ -1,17 +0,0 @@
-package com.mogo.cloud;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() {
-        assertEquals(4, 2 + 2);
-    }
-}