Sorry maybe this is not new topic, but really need help, i was try many post about this, but my problem still not fix, i am newbie about android. I try to learn Material Design,
To use the AppCompat Theme you have to include this library in your project.
compile 'com.android.support:appcompat-v7:22.2.0'
Also I suggest you using the latest version 22.2.0 instead of 22.0.0
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.0'
//You can remove this line, because the appcompat has the support-v4 as dependency
//com.android.support:support-v4:22.0.0'
}