项目无法在Android Studio中运行

Question

I'm doing the beginner android course on udacity and the code that they make you put in the MainActivity.java file is full of errors and keeps saying build failed in the console. Here is a link to a screenshot of android studio after failed build http://postimg.org/image/6etcu6ldz/

Answer 1

I think support library is missing.

Go to your build.gradle (Module:app) and check if support library is in dependencies section.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:support-v4:21.+'
}

In addition, you have to install it in SDK Manager.

I hope this answer will help you!