Android activity跳转exception

log:

 java.lang.RuntimeException:
 Unable to start receiver com.vkoov.csipsimple.service.OutgoingCall: android.util.AndroidRuntimeException:
 Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2126)
     at android.app.ActivityThread.access$1500(ActivityThread.java:123)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1197)
     at android.os.Handler.dispatchMessage(Handler.java:99)
     at android.os.Looper.loop(Looper.java:137)
     at android.app.ActivityThread.main(ActivityThread.java:4426)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:511)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
     at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
     at android.app.ContextImpl.startActivity(ContextImpl.java:847)
     at android.content.ContextWrapper.startActivity(ContextWrapper.java:276)
     at android.content.ContextWrapper.startActivity(ContextWrapper.java:276)
     at com.vkoov.csipsimple.service.OutgoingCall.onReceive(Unknown Source)
     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2119)

解决方法；（其实log中已经告诉我们怎么改了）

Context中有一个startActivity方法，Activity继承自Context，重载了startActivity方法。如果使用 Activity的startActivity方法，不会有任何限制，而如果使用Context的startActivity方法的话，就需要开启一个新 的task，遇到上面那个异常的，都是因为使用了Context的startActivity方法。解决办法是，加一个flag。

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);