我已将项目从Eclipse升级到Android工作室。我在应用启动后收到以下错误
java.lang.NoClassDefFoundError: android.support.v7.app.AppCompatDelegateImplV14
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:93)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:77)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:429)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:57)
at com.lib.base.NBaseActionBarActivity.onCreate(NBaseActionBarActivity.java:39)
at com.app.home.HomeFragmentActivity.onCreate(HomeFragmentActivity.java:254)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
导致此问题的原因是什么?我已将appcompat v7添加到gradle中,
compile 'com.android.support:appcompat-v7:22.2.0'
提前致谢。