android device monitor not coming up

I get following error in logs when i click on ADM icon in my android studio. I saw there was already a thread here about this but the solution seems to be for eclipse. However, there is some issue on gradle side today so i changed the https to http in my properties file. I was able to import the project. However, while running it crashes, i want to see the logs and open ADM but it pops up a message with a log file. Following is the end of the log file

!ENTRY org.eclipse.osgi 4 0 2015-04-11 19:04:38.452 !MESSAGE Application error !STACK 1 java.lang.NullPointerException at org.eclipse.core.runtime.URIUtil.toURI(URIUtil.java:280) at org.eclipse.e4.ui.internal.workbench.ResourceHandler.loadMostRecentModel(ResourceHandler.java:127) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.loadApplicationModel(E4Application.java:370) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:220) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:557) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at com.android.ide.eclipse.monitor.MonitorApplication.start(MonitorApplication.java:86) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) at org.eclipse.equinox.launcher.Main.run(Main.java:1438)

Could it be because of following gradle certificate issue? Gradle sync error in Android studio when importing project

Thanks

回答1:

Ensure that no other instance of monitor app is running. It may happen if Android Studio crashes or otherwise.

Kill the monitor process and restart.

See also: https://code.google.com/p/android/issues/detail?id=72420

回答2:

I use a Mac and have encountered this problem.

Finally, I found out that I have opened the Android Device Monitor, so I closed the previous one and reopened it and it started successfully. Reference link