ViewPagerIndicator CirclePageIndicator no se puede instanciar

Añado ViewPageIndicator en mi proyecto existente. Hago todas las cosas en el enlace de abajo.

https://www.youtube.com/watch?v=yTaIQ0LMLy0 

Cuando agrego CirclePageIndicator al diseño, consigo este error.

Introduzca aquí la descripción de la imagen

Rastreo de la pila de excepciones:

 java.lang.NullPointerException at com.android.layoutlib.bridge.android.BridgeContext.obtainStyledAttributes(BridgeContext.java:568) at android.view.View.<init>(View.java:3283) at com.viewpagerindicator.CirclePageIndicator.<init>(CirclePageIndicator.java:76) at com.viewpagerindicator.CirclePageIndicator.<init>(CirclePageIndicator.java:72) 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.rInflate_Original(LayoutInflater.java:749) 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.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.LayoutEditorDelegate.recomputeLayout(LayoutEditorDelegate.java:410) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.SelectionManager.setSelection(SelectionManager.java:285) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.LayoutCanvasViewer.setSelection(LayoutCanvasViewer.java:120) at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:394) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.selectionChanged(GraphicalEditorPart.java:611) at org.eclipse.ui.internal.e4.compatibility.SelectionService.notifyListeners(SelectionService.java:154) at org.eclipse.ui.internal.e4.compatibility.SelectionService.updateSelection(SelectionService.java:119) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:170) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$2.run(PartServiceImpl.java:193) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:191) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:596) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:549) at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:105) at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:61) 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:1058) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1447) at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:2328) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4572) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541) at org.eclipse.swt.widgets.Tree.callWindowProc(Tree.java:1442) at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:5878) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2440) at org.eclipse.swt.widgets.Tree.callWindowProc(Tree.java:1534) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:5977) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:3129) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3753) 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) 

Y aquí está mi xml de diseño.

  <LinearLayout android:layout_width="fill_parent" android:layout_height="match_parent" android:layout_below="@id/linearLayout1" android:orientation="vertical" > <android.support.v4.view.ViewPager android:id="@+id/view_pager" android:layout_width="match_parent" android:layout_height="match_parent" /> <com.viewpagerindicator.CirclePageIndicator android:id="@+id/indicator" android:padding="10dip" android:layout_height="wrap_content" android:layout_width="fill_parent" /> </LinearLayout> 

Y después en el lado del código (método onCreate), agrego el código.

  CirclePageIndicator titleIndicator = (CirclePageIndicator)findViewById(R.id.indicator); titleIndicator.setViewPager(viewPager); 

Cuando empecé la aplicación, el indicador no se muestra. ¿Cuál puede ser el problema?

Porque usted fijó ViewPager para tomar la pantalla entera. Usted debe hacer su xml como a continuación.

 <LinearLayout android:layout_width="fill_parent" android:layout_height="match_parent" android:layout_below="@id/linearLayout1" android:orientation="vertical" > <android.support.v4.view.ViewPager android:id="@+id/view_pager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> <com.viewpagerindicator.CirclePageIndicator android:id="@+id/indicator" android:padding="10dip" android:layout_height="wrap_content" android:layout_width="fill_parent" /> </LinearLayout> 
  • No se puede agregar ViewPagerIndicator a la aplicación con Gradle
  • Personalizar el relleno y el margen en IconPageIndicator
  • TabPageIndicator no estilo correctamente dentro de Fragmento
  • Cómo configurar la imagen personalizada en el espacio entre dos CirclePageIndicator en android?
  • Indicar después de pasar la última página en ViewPager
  • Insertar páginas en el medio de un FragmentPageAdapter
  • ¿Existe un DotsPageIndicator predeterminado para Android móvil (no usar)?
  • Cómo implementar en el icono de escuchar el clic en IconPageIndicator
  • Java.lang.IllegalStateException: ViewPager no se ha consolidado (usando el indicador JakeWharton ViewPager)
  • Utilizar varios diseños en ViewPageIndicator
  • Fijar las pestañas con android.support.v4.view.PagerTabStrip o ViewPagerIndicator
  • FlipAndroid es un fan de Google para Android, Todo sobre Android Phones, Android Wear, Android Dev y Aplicaciones para Android Aplicaciones.