Develop Reference

Trying to integrate Tap for Tap in my Application

I am trying to integrate tap for tap in my application. I am following their documentation from here: https://tapfortap.com/doc/android/integration. Everything seems fine up to when I added:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.tapfortap.Banner
android:id="#+id/banner"
android:layout_width="320dip"
android:layout_height="50dip"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
I get the following message in the graphical layout:
com.tapfortap.Banner failed to instantiate.
and in the error log:
java.lang.NullPointerException
at com.tapfortap.Banner.stopShowingAds(Unknown Source)
at com.tapfortap.Banner.startShowingAds(Unknown Source)
at com.tapfortap.Banner.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:422)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:179)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:207)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:135)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:755)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:758)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:727)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:373)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:385)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:332)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:325)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:440)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1545)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1302)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.activated(GraphicalEditorPart.java:1059)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegateActivated(LayoutEditorDelegate.java:743)
at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.activated(CommonXmlEditor.java:416)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.LayoutWindowCoordinator.partActivated(LayoutWindowCoordinator.java:379)
at org.eclipse.ui.internal.PartService$6.run(PartService.java:131)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.PartService.partActivated(PartService.java:129)
at org.eclipse.ui.internal.WorkbenchPage$12.run(WorkbenchPage.java:4314)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4312)
at org.eclipse.ui.internal.WorkbenchPage.access$14(WorkbenchPage.java:4292)
at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:169)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$2.run(PartServiceImpl.java:190)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:188)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.setPart(PartServiceImpl.java:163)
at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:77)
at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:106)
at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:308)
at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:322)
at org.eclipse.e4.core.internal.contexts.EclipseContext.activate(EclipseContext.java:608)
at org.eclipse.e4.core.internal.contexts.EclipseContext.activateBranch(EclipseContext.java:613)
at org.eclipse.e4.ui.internal.workbench.PartActivationHistory.activate(PartActivationHistory.java:52)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:560)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:531)
at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:105)
at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$ActivationJob.run(StackRenderer.java:202)
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:4144)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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(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:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
However thier website says that my app is registered, but I am not able to see any ads if I test it on a device or emulator, however I have added the testing meta tags in my Manifest and all thier permissions.
In Activity:
TapForTap.initialize(this, "*******************");

Thats because there is no class called com.tapfortap.Banner.
You need to use com.tapfortap.sdk.Banner from the new zip file https://github.com/tapfortap/Android/archive/master.zip.
Extract the zip file and again extract TapforTap.aar, you will get classes.jar use that in your program.

Implementing Satellite Menu for Android ( classes could not be instantiated)

I added this object to my xml layout
<android.view.ext.SatelliteMenu
android:id="#+id/menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
sat:closeOnClick="true"
sat:expandDuration="500"
sat:mainImage="#drawable/ic_launcher"
sat:satelliteDistance="170dp"
sat:totalSpacingDegree="90" >
</android.view.ext.SatelliteMenu>
and recieve this error :
The following classes could not be instantiated:
- android.view.ext.SatelliteMenu (Open Class, Show Error Log)
See the Error Log (Window > Show View) for more details.
so i look in Log and i got these details
android.content.res.Resources$NotFoundException: Could not resolve resource value: 0x7F030015.
at android.content.res.BridgeResources.throwException(BridgeResources.java:693)
at android.content.res.BridgeResources.getLayout(BridgeResources.java:271)
at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
at android.view.ext.SatelliteMenu.init(SatelliteMenu.java:78)
at android.view.ext.SatelliteMenu.<init>(SatelliteMenu.java:69)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:422)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:179)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:207)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:135)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:746)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:718)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:372)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:385)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:332)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:325)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:440)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderPreview.renderSync(RenderPreview.java:560)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderPreview.access$5(RenderPreview.java:506)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderPreview$RenderJob.runInUIThread(RenderPreview.java:1230)
at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:95)
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:4144)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
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 org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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(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:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414
)
that this mean ?
when i run this project in the first time the object work fine and after this it do troubles

OPTION #1:
Sometimes, when a new resource is added, Eclipse doesn't compile correctly the new code (maybe a caching issue), causing this error.
Normally, simply restarting Eclipse is enough to fix the problem.
OPTION #2:
Sometimes, rendering custom views causes this exception. The only workaround I know is checking View.isInEditMode every time you try to use the getResources().
An example could be:
if (isInEditMode()) {
//do something else, as getResources() is not valid.
} else {
//you can use getResources()
String mystring = getResources().getString(R.string.mystring);
}

main.xml: java.lang.NullPointerException Android Eclipse Error

So I just installed the Android SDK and the ADT addon for eclipse and ran into a problem.
When I go to the graphical layout in main.xml no layout shows up. Instead I just get this error
$java.lang.NullPointerException
at sun.awt.FontConfiguration.getInitELC(Unknown Source)
at sun.awt.FontConfiguration.initFontConfig(Unknown Source)
at sun.awt.FontConfiguration.<init>(Unknown Source)
at sun.awt.windows.WFontConfiguration.<init>(Unknown Source)
at sun.awt.Win32GraphicsEnvironment.createFontConfiguration(Unknown Source)
at sun.java2d.SunGraphicsEnvironment$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.java2d.SunGraphicsEnvironment.<init>(Unknown Source)
at sun.awt.Win32GraphicsEnvironment.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Unknown Source)
at sun.font.FontDesignMetrics.getDefaultFrc(Unknown Source)
at sun.font.FontDesignMetrics.getMetrics(Unknown Source)
at sun.awt.SunToolkit.getFontMetrics(Unknown Source)
at sun.awt.windows.WToolkit.getFontMetrics(Unknown Source)
at android.graphics.Paint_Delegate.updateFontObject(Paint_Delegate.java:1062)
at android.graphics.Paint_Delegate.reset(Paint_Delegate.java:1039)
at android.graphics.Paint_Delegate.<init>(Paint_Delegate.java:991)
at android.graphics.Paint_Delegate.native_init(Paint_Delegate.java:614)
at android.graphics.Paint.native_init(Paint.java)
at android.graphics.Paint.<init>(Paint.java:194)
at android.graphics.Paint.<init>(Paint.java:184)
at android.view.ViewGroup.<init>(ViewGroup.java:278)
at android.widget.LinearLayout.<init>(LinearLayout.java:116)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:227)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:318)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:325)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:372)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1317)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1071)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ConfigListener.onConfigurationChange(GraphicalEditorPart.java:493)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.onRenderingTargetChange(ConfigurationComposite.java:2192)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.access$4(ConfigurationComposite.java:2157)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite$2.widgetSelected(ConfigurationComposite.java:441)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
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:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
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:369)
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:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
at org.eclipse.equinox.launcher.Main.main(Main.java:1384)
It doesnt matter what android version I am in I still get this error. I have tried uninstalling the SDK and the addon and to no avail. I am using SDK r14 tools and the ADT 14.0.
Anyone got any suggestions

Does it happen as soon as you open the XML file?
It may be worth checking the source in the XML file. Open the directory to where the file is contained and edit it (in Notepad etc) and just paste the following:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hi, did this work?" />
</LinearLayout>
That's about as simple as it gets. If that works, you know the XML in your current main.xml is wrong.
May also be worth rebuilding/cleaning your project.

Errors with ADT/Graphical Layout

I'm trying to view my layout in the Graphical Layout display and when I do I see a nullpointerexception and an error that layout.xml: NoClassDefFoundError: Could not initialize class android.widget.TextView and another error like this:
java.lang.NullPointerException
at android.graphics.Paint.measureText(Paint.java:801)
at android.graphics.Paint.measureText(Paint.java:874)
at android.widget.TextView.<clinit>(TextView.java:292)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at android.view.LayoutInflater.createView(LayoutInflater.java:500)
at android.view.BridgeInflater.onCreateView(BridgeInflater.java:77)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:122)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:296)
at com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:397)
at com.android.ide.common.rendering.LayoutLibrary.createLegacySession(LayoutLibrary.java:492)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:337)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1510)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1347)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1078)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ConfigListener.onConfigurationChange(GraphicalEditorPart.java:500)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.onTargetChange(GraphicalEditorPart.java:980)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.onDescriptorsChanged(LayoutEditor.java:587)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.initUiRootNode(LayoutEditor.java:509)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.updateEditor(GraphicalEditorPart.java:794)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.onTargetLoaded(GraphicalEditorPart.java:759)
at com.android.ide.eclipse.adt.AdtPlugin$13.run(AdtPlugin.java:1651)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3593)
at org.eclipse.swt.widgets.Display.observerProc(Display.java:3234)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)
at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1025)
at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1021)
at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2263)
at org.eclipse.swt.widgets.Combo.mouseDown(Combo.java:981)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4983)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)
at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:1959)
at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2025)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5047)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4589)
at org.eclipse.swt.widgets.Display.applicationProc(Display.java:4666)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:115)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3281)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
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:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
What can I do to fix this?

I have faced problem related to this not exactly this but something related
so you should re-install your jdk and jre in your system and then run eclipse, if the same not resolved then try to re-install eclipse again because some times the plug in files are corrupted due to any reason
so you should try this

Nothing worked so I just installed MotoDev and it all works now.

Eclipse Grapic Layout: Unable to resolve drawable ... in attribute "background"

Hi. I'm adding a background xml file to an Imageview but i get this error in the Eclipse Graphical layout:
error! Unable to resolve drawable
"com.android.ide.common.rendering.api.ResourceValue#1ae0c2"
in attribute "background" Exception
details are logged in Window > Show
View > Error Log
When i run the widget on the device, the background is displayed in the right way, but the error in Eclipse is really annoying. The background file is:
<?xml version="1.0" encoding="utf-8"?>
<bitmap
xmlns:android="http://schemas.android.com/apk/res/android"
android:src="#drawable/grey_back_tile"
android:tileMode="repeat" />
And here's where I use it:
<ImageView android:layout_gravity="top|center_horizontal" android:layout_marginTop="4dp" android:layout_width="286dp" android:layout_height="47dp" android:background="#drawable/widget_background_banner"/>
The error log stack trace shows:
org.xmlpull.v1.XmlPullParserException:
Binary XML file line #5:
requires a valid src attribute at
android.graphics.drawable.BitmapDrawable.inflate(BitmapDrawable.java:341)
at
android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:779)
at
android.graphics.drawable.Drawable.createFromXml(Drawable.java:720)
at
com.android.layoutlib.bridge.ResourceHelper.getDrawable(ResourceHelper.java:150)
at
com.android.layoutlib.bridge.BridgeTypedArray.getDrawable(BridgeTypedArray.java:668)
at
android.view.View.(View.java:1846)
at
android.widget.ImageView.(ImageView.java:109)
at
android.widget.ImageView.(ImageView.java:105)
at
sun.reflect.GeneratedConstructorAccessor16.newInstance(Unknown
Source) at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
Source) at
java.lang.reflect.Constructor.newInstance(Unknown
Source) at
android.view.LayoutInflater.createView(LayoutInflater.java:499)
at
android.view.BridgeInflater.onCreateView(BridgeInflater.java:77)
at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:562)
at
android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:122)
at
android.view.LayoutInflater.rInflate(LayoutInflater.java:617)
at
android.view.LayoutInflater.rInflate(LayoutInflater.java:620)
at
android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at
android.view.LayoutInflater.inflate(LayoutInflater.java:296)
at
com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:377)
at
com.android.ide.common.rendering.LayoutLibrary.createLegacySession(LayoutLibrary.java:394)
at
com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:276)
at
com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(Unknown
Source) at
com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(Unknown
Source) at
com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(Unknown
Source) at
com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.activated(Unknown
Source) at
com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.partActivated(Unknown
Source) at
com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.partBroughtToTop(Unknown
Source) at
org.eclipse.ui.internal.PartListenerList$2.run(PartListenerList.java:87)
at
org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at
org.eclipse.core.runtime.Platform.run(Platform.java:888)
at
org.eclipse.ui.internal.PartListenerList.fireEvent(PartListenerList.java:57)
at
org.eclipse.ui.internal.PartListenerList.firePartBroughtToTop(PartListenerList.java:85)
at
org.eclipse.ui.internal.PartService.firePartBroughtToTop(PartService.java:208)
at
org.eclipse.ui.internal.WorkbenchPagePartList.firePartBroughtToTop(WorkbenchPagePartList.java:76)
at
org.eclipse.ui.internal.WorkbenchPagePartList.fireActiveEditorChanged(WorkbenchPagePartList.java:52)
at
org.eclipse.ui.internal.PartList.setActiveEditor(PartList.java:162)
at
org.eclipse.ui.internal.WorkbenchPage.makeActiveEditor(WorkbenchPage.java:1281)
at
org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3530)
at
org.eclipse.ui.internal.WorkbenchPage.requestActivation(WorkbenchPage.java:3077)
at
org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:279)
at
org.eclipse.ui.internal.EditorPane.requestActivation(EditorPane.java:98)
at
org.eclipse.ui.internal.PartPane.setFocus(PartPane.java:325)
at
org.eclipse.ui.internal.EditorPane.setFocus(EditorPane.java:127)
at
org.eclipse.ui.internal.PartStack.presentationSelectionChanged(PartStack.java:844)
at
org.eclipse.ui.internal.PartStack.access$1(PartStack.java:827)
at
org.eclipse.ui.internal.PartStack$1.selectPart(PartStack.java:137)
at
org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:133)
at
org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:269)
at
org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:278)
at
org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)
at
org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$2.handleEvent(DefaultTabFolder.java:88)
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.Widget.sendEvent(Widget.java:1077)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at
org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
at
org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:2743)
at
org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1429)
at
org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:257)
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:4066)
at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at
org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at
org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at
org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at
org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
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:369)
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:619)
at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at
org.eclipse.equinox.launcher.Main.run(Main.java:1407)
Naturally the "grey_back_tile.png" is a valid resource, and it's located int the "drawable-hdpi" folder. Any clue to get rid of that error?

I know I am late to this but faced the same issue. I'm pretty certain it's an Eclipse ADT bug but to prevent the annoying errors, if you create a style and add a background item to your tiled background and refer the layout to that, as opposed to editing the background attribute on the layout, it should work and you won't get the annoying errors.
So, tiled background XML named app_background:
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:src="#drawable/space" android:tileMode="repeat" />
Then a style, referring to it:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="TestBackground">
<item name="android:background">#drawable/app_background</item>
</style>
</resources>
And then assign the style to the layout:
style="#style/TestBackground"