Eclipse throws java.lang.NullPointerException on creating android junit test configuration

Question

I've got Android project in Eclipse.

I created test project for my Project Try to create test configuration as written at Testing from Eclipse with ADT at developer.android.com.

My actions:

• Run->Run configurations
• Select Android JUnit Test->New
• There is error message "An error has occured. See error log for more details. java.lang.NullPointerException".

• Log:

  Problems occurred when invoking code from plug-in: "org.eclipse.jface".
  
  java.lang.NullPointerException
  at com.android.ide.eclipse.adt.internal.launch.junit.InstrumentationRunnerValidator.<init>(InstrumentationRunnerValidator.java:48)
  at com.android.ide.eclipse.adt.internal.launch.junit.InstrumentationRunnerValidator.<init>(InstrumentationRunnerValidator.java:59)
  at com.android.ide.eclipse.adt.internal.launch.junit.AndroidJUnitLaunchConfigurationTab.loadInstrumentations(AndroidJUnitLaunchConfigurationTab.java:954)
  at com.android.ide.eclipse.adt.internal.launch.junit.AndroidJUnitLaunchConfigurationTab.initializeFrom(AndroidJUnitLaunchConfigurationTab.java:335)
  at org.eclipse.debug.ui.AbstractLaunchConfigurationTabGroup.initializeFrom(AbstractLaunchConfigurationTabGroup.java:86)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupWrapper.initializeFrom(LaunchConfigurationTabGroupWrapper.java:194)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.displayInstanceTabs(LaunchConfigurationTabGroupViewer.java:751)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer$8.run(LaunchConfigurationTabGroupViewer.java:623)
  at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.inputChanged(LaunchConfigurationTabGroupViewer.java:640)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.setInput0(LaunchConfigurationTabGroupViewer.java:602)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.setInput(LaunchConfigurationTabGroupViewer.java:578)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.handleLaunchConfigurationSelectionChanged(LaunchConfigurationsDialog.java:941)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog$3.selectionChanged(LaunchConfigurationsDialog.java:560)
  at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:888)
  at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
  at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
  at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
  at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:886)
  at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1726)
  at org.eclipse.jface.viewers.TreeViewer.setSelection(TreeViewer.java:1139)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationView.handleConfigurationAdded(LaunchConfigurationView.java:283)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationView.access$1(LaunchConfigurationView.java:272)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationView$2.run(LaunchConfigurationView.java:261)
  at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
  at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
  at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
  at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
  at org.eclipse.jface.window.Window.open(Window.java:801)
  at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.open(LaunchConfigurationsDialog.java:1132)
  at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:579)
  at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
  at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationDialogOnGroup(DebugUITools.java:587)
  at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationDialogOnGroup(DebugUITools.java:521)
  at org.eclipse.debug.ui.actions.OpenLaunchDialogAction.run(OpenLaunchDialogAction.java:81)
  at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
  at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
  at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
  at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
  at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
  at org.eclipse.jface.window.Window.open(Window.java:801)
  at org.eclipse.ui.internal.views.log.EventDetailsDialog.open(EventDetailsDialog.java:180)
  at org.eclipse.ui.internal.views.log.EventDetailsDialogAction.run(EventDetailsDialogAction.java:98)
  at org.eclipse.ui.internal.views.log.LogView$15.doubleClick(LogView.java:535)
  at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:845)
  at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
  at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
  at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
  at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:843)
  at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1462)
  at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1246)
  at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:249)
  at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:246)
  at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:307)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
  at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
  at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
  at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
  at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
  at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
  at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
  at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
  at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
  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:344)
  at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
  at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
  at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
  at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
  

I can edit this configuration, but buttons "Apply" and "Run" are disabled and configuration is not added to run button menu.

If try to edit debug configuration, the same problem.

System:

• Eclipse version: 3.7.1 (the latest)
• Windows 7 x64

Answer 1

I figured out a work around that seems to work on my Eclipse installation.

1. Start Eclipse
2. List "Run Configurations" from the "Run" menu.
3. Select the "Android JUnit Test" category, and then click the "New" toolbar icon.
4. A "New_configuration" will be created, but a "NullPointerException" will be shown. After this it's not possible to edit the configuration.
5. Exit Eclipse
6. Open your file explorer, and navigate to [eclipse-workspace].metadata.plugins\org.eclipse.debug.core.launches
7. This is where the run configurations are stored. Edit the file "New_configuration.launch" with a text editor.
8. There can't be an empty entry for the PROJEC_ATTR node. For the value attribute type the name of a project that exists in Eclipse.
9. Save the file.
10. Rename file to desired run configuration name.
11. Start Eclipse

You should now be able to edit the JUnit Test configuration for Android without receiving any NullPointer exceptions. I noticed after doing this, there are a few more XML nodes added to the configuration file that were missing before. So it seems that the bug is only during file creation, and not file updating.

I hope this helps other people.

Here is a sample launch file that works (assumes the project name is GemsTest.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <launchConfiguration type="com.android.ide.eclipse.adt.junit.launchConfigurationType">
    <stringAttribute key="com.android.ide.eclipse.adt.commandline" value=""/>
    <intAttribute key="com.android.ide.eclipse.adt.delay" value="0"/>
    <booleanAttribute key="com.android.ide.eclipse.adt.nobootanim" value="false"/>
    <intAttribute key="com.android.ide.eclipse.adt.speed" value="0"/>
    <stringAttribute key="com.android.ide.eclipse.adt.target" value="AUTO"/>
    <booleanAttribute key="com.android.ide.eclipse.adt.wipedata" value="false"/>
    <stringAttribute key="org.eclipse.jdt.junit.CONTAINER" value=""/>
    <stringAttribute key="org.eclipse.jdt.launching.MAIN_TYPE" value=""/>
    <stringAttribute key="org.eclipse.jdt.launching.PROJECT_ATTR" value="GemsTest"/>
</launchConfiguration>