报 类无法找到

1.修改 gradle: 

distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip

2.google()仓库去掉

3. dependencies 下都改成：

dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])     androidTestCompile('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' } 4.工程修改版本

classpath 'com.android.tools.build:gradle:2.2.2' 5.     buildToolsVersion "25.0.2"