这个问题在这里已经有了答案:NullPointerException:printlnneedsamessageinandroid(6个回答)关闭1年前.我得到错误:java.lang.NullPointerException:println调用此方法时需要一条消息:lst_info=newHashMap();SystemDatabaseHandlerdb=newSystemDatabaseHandler(getApplicationContext());lst_info=db.getLstInfo(sql_id);系统数据库处理程序:publicHashMapgetLstInfo(in

这个问题在这里已经有了答案:NullPointerException:printlnneedsamessageinandroid(6个回答)关闭1年前.我得到错误:java.lang.NullPointerException:println调用此方法时需要一条消息:lst_info=newHashMap();SystemDatabaseHandlerdb=newSystemDatabaseHandler(getApplicationContext());lst_info=db.getLstInfo(sql_id);系统数据库处理程序:publicHashMapgetLstInfo(in

我的Activity类扩展了android.support.v7.app.ActionBarActivity。我正在请求窗口功能并在onCreate()方法中调用setSupportProgressBarIndeterminateVisibility()，如下所示:protectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);setContentVie

我的Activity类扩展了android.support.v7.app.ActionBarActivity。我正在请求窗口功能并在onCreate()方法中调用setSupportProgressBarIndeterminateVisibility()，如下所示:protectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);setContentVie

我最近从Eclipse迁移到AndroidStudio，在这样做时我发现了以下错误java.lang.UnsupportedOperationException:Thisisnotsupported,useMenuItemCompat.setOnActionExpandListener()atandroid.support.v7.internal.view.menu.MenuItemImpl.setOnActionExpandListener(MenuItemImpl.java:740)atbiz.nickbullcomputing.bevnav.MainActivity.onCrea

我最近从Eclipse迁移到AndroidStudio，在这样做时我发现了以下错误java.lang.UnsupportedOperationException:Thisisnotsupported,useMenuItemCompat.setOnActionExpandListener()atandroid.support.v7.internal.view.menu.MenuItemImpl.setOnActionExpandListener(MenuItemImpl.java:740)atbiz.nickbullcomputing.bevnav.MainActivity.onCrea

您好，我在使用pageViwer和Adapter滑过3个fragment时遇到此错误。这是我的页面适配器publicclassFreedomPageAdapterextendsFragmentPagerAdapter{privateListlistFragment;publicFreedomPageAdapter(FragmentManagerfm,ListlistFragment){super(fm);this.listFragment=listFragment;}/**(non-Javadoc)**@seeandroid.support.v4.app.FragmentPagerAd

您好，我在使用pageViwer和Adapter滑过3个fragment时遇到此错误。这是我的页面适配器publicclassFreedomPageAdapterextendsFragmentPagerAdapter{privateListlistFragment;publicFreedomPageAdapter(FragmentManagerfm,ListlistFragment){super(fm);this.listFragment=listFragment;}/**(non-Javadoc)**@seeandroid.support.v4.app.FragmentPagerAd

我在GooglePlay商店中有一个OpenGL应用程序，我每天都遇到异常:java.lang.RuntimeException:eglSwapBuffersfailed:EGL_SUCCESSatandroid.opengl.GLSurfaceView$EglHelper.throwEglException(GLSurfaceView.java:1085)atandroid.opengl.GLSurfaceView$EglHelper.swap(GLSurfaceView.java:1043)atandroid.opengl.GLSurfaceView$GLThread.guarde

我在GooglePlay商店中有一个OpenGL应用程序，我每天都遇到异常:java.lang.RuntimeException:eglSwapBuffersfailed:EGL_SUCCESSatandroid.opengl.GLSurfaceView$EglHelper.throwEglException(GLSurfaceView.java:1085)atandroid.opengl.GLSurfaceView$EglHelper.swap(GLSurfaceView.java:1043)atandroid.opengl.GLSurfaceView$GLThread.guarde