viewpager和listview 请问各位大神,怎么在viewpager的一个页面里面添加一个listview,我在一个页面里添加了一个listview,然后再listview里添加了数组,程序就会FC,如果没有添加数组就可以正常启动,他提示的问题是空指针问题,有谁知道具体应该怎么改吗 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 05-05 14:55:24.315: E/AndroidRuntime(830): FATAL EXCEPTION: main05-05 14:55:24.315: E/AndroidRuntime(830): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cjj.huzinform/com.cjj.huzinform.SchoolNoticeActivity}: java.lang.NullPointerException05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2023)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost.setCurrentTab(TabHost.java:413)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost.setCurrentTabByTag(TabHost.java:287)05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.MainActivity$1.onCheckedChanged(MainActivity.java:74)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup.setCheckedId(RadioGroup.java:174)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup.access$600(RadioGroup.java:54)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup$CheckedStateTracker.onCheckedChanged(RadioGroup.java:358)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.setChecked(CompoundButton.java:129)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.toggle(CompoundButton.java:87)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioButton.toggle(RadioButton.java:76)05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.performClick(CompoundButton.java:99)05-05 14:55:24.315: E/AndroidRuntime(830): at android.view.View$PerformClick.run(View.java:17355)05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Handler.handleCallback(Handler.java:725)05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Handler.dispatchMessage(Handler.java:92)05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Looper.loop(Looper.java:137)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.main(ActivityThread.java:5041)05-05 14:55:24.315: E/AndroidRuntime(830): at java.lang.reflect.Method.invokeNative(Native Method)05-05 14:55:24.315: E/AndroidRuntime(830): at java.lang.reflect.Method.invoke(Method.java:511)05-05 14:55:24.315: E/AndroidRuntime(830): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)05-05 14:55:24.315: E/AndroidRuntime(830): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)05-05 14:55:24.315: E/AndroidRuntime(830): at dalvik.system.NativeStart.main(Native Method)05-05 14:55:24.315: E/AndroidRuntime(830): Caused by: java.lang.NullPointerException05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.SchoolNoticeActivity.adapting(SchoolNoticeActivity.java:213)05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.SchoolNoticeActivity.onCreate(SchoolNoticeActivity.java:48)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.Activity.performCreate(Activity.java:5104)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)05-05 14:55:24.315: E/AndroidRuntime(830): ... 24 more05-05 14:55:33.781: E/Trace(943): error opening trace file: No such file or directory (2)麻烦看一下,谢谢 com.cjj.huzinform.SchoolNoticeActivity.adapting(SchoolNoticeActivity.java:213)在SchoolNoticeActivity这个类的213行报空指针 也就是那个地方使用了空的对象 你看看是什么原因造成那个对象为空 或者加个判断if(null!=xxx)但不推荐这么做 arcgis for android 路径绘制 一个效果问题 自定义相机,定点对焦 android登录页布局问题 新手求教:为什么编译过程中自动生成一个main.out.xml文件 hander 和 Thread 一起联用 安卓小问题,真的很小很小。 android消息推送怎么做? Android 如何调用系统默认的应用程序列表界面,如下图 请问使用fragment+viewpag,点击按钮时,弹出界面的问题 如何编译Nesoid android 编译frameworks/base/中的模块
05-05 14:55:24.315: E/AndroidRuntime(830): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cjj.huzinform/com.cjj.huzinform.SchoolNoticeActivity}: java.lang.NullPointerException
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2023)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost.setCurrentTab(TabHost.java:413)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.TabHost.setCurrentTabByTag(TabHost.java:287)
05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.MainActivity$1.onCheckedChanged(MainActivity.java:74)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup.setCheckedId(RadioGroup.java:174)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup.access$600(RadioGroup.java:54)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioGroup$CheckedStateTracker.onCheckedChanged(RadioGroup.java:358)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.setChecked(CompoundButton.java:129)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.toggle(CompoundButton.java:87)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.RadioButton.toggle(RadioButton.java:76)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.widget.CompoundButton.performClick(CompoundButton.java:99)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.view.View$PerformClick.run(View.java:17355)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Handler.handleCallback(Handler.java:725)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Handler.dispatchMessage(Handler.java:92)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.os.Looper.loop(Looper.java:137)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-05 14:55:24.315: E/AndroidRuntime(830): at java.lang.reflect.Method.invokeNative(Native Method)
05-05 14:55:24.315: E/AndroidRuntime(830): at java.lang.reflect.Method.invoke(Method.java:511)
05-05 14:55:24.315: E/AndroidRuntime(830): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-05 14:55:24.315: E/AndroidRuntime(830): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-05 14:55:24.315: E/AndroidRuntime(830): at dalvik.system.NativeStart.main(Native Method)
05-05 14:55:24.315: E/AndroidRuntime(830): Caused by: java.lang.NullPointerException
05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.SchoolNoticeActivity.adapting(SchoolNoticeActivity.java:213)
05-05 14:55:24.315: E/AndroidRuntime(830): at com.cjj.huzinform.SchoolNoticeActivity.onCreate(SchoolNoticeActivity.java:48)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.Activity.performCreate(Activity.java:5104)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 14:55:24.315: E/AndroidRuntime(830): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-05 14:55:24.315: E/AndroidRuntime(830): ... 24 more
05-05 14:55:33.781: E/Trace(943): error opening trace file: No such file or directory (2)麻烦看一下,谢谢
在SchoolNoticeActivity这个类的213行报空指针 也就是那个地方使用了空的对象 你看看是什么原因造成那个对象为空 或者加个判断if(null!=xxx)但不推荐这么做