删除无用配置。

app/build.gradle

@@ -2,7 +2,6 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.3"
     defaultConfig {
         applicationId "cn.itsite.aguider.demo"
         minSdkVersion 19
@@ -20,12 +19,12 @@ android {
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.3.1'
-    compile 'com.android.support:design:25.3.1'
-    testCompile 'junit:junit:4.12'
-    compile project(':library')
+    implementation 'com.android.support:appcompat-v7:25.3.1'
+    implementation 'com.android.support:design:25.3.1'
+    testImplementation 'junit:junit:4.12'
+    implementation project(':library')
 }

app/src/main/gen/cn/itsite/aguider/demo/BuildConfig.java

@@ -0,0 +1,8 @@
+/*___Generated_by_IDEA___*/
+
+package cn.itsite.aguider.demo;
+
+/* This stub is only used by the IDE. It is NOT the BuildConfig class actually packed into the APK */
+public final class BuildConfig {
+  public final static boolean DEBUG = Boolean.parseBoolean(null);
+}

app/src/main/gen/cn/itsite/aguider/demo/Manifest.java

@@ -0,0 +1,7 @@
+/*___Generated_by_IDEA___*/
+
+package cn.itsite.aguider.demo;
+
+/* This stub is only used by the IDE. It is NOT the Manifest class actually packed into the APK */
+public final class Manifest {
+}

app/src/main/gen/cn/itsite/aguider/demo/R.java

@@ -0,0 +1,7 @@
+/*___Generated_by_IDEA___*/
+
+package cn.itsite.aguider.demo;
+
+/* This stub is only used by the IDE. It is NOT the R class actually packed into the APK */
+public final class R {
+}

build.gradle

@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Nov 24 09:05:49 CST 2017
+#Tue May 15 17:00:46 CST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

library/build.gradle

@@ -2,7 +2,6 @@ apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.3"
 
     defaultConfig {
         minSdkVersion 19
@@ -22,10 +21,10 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.3.1'
-    testCompile 'junit:junit:4.12'
+    implementation 'com.android.support:appcompat-v7:25.3.1'
+    testImplementation 'junit:junit:4.12'
 }

library/src/main/AndroidManifest.xml

@@ -1,8 +1,3 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="cn.itsite.aguider">
+<manifest package="cn.itsite.aguider" />
 
-    <application android:allowBackup="true" android:label="@string/app_name"
-        android:supportsRtl="true">
-    </application>
 
-</manifest>