Android - 基本 Activity 中异常奇怪的未捕获异常

Question

我不知道这里发生了什么......下类后......

这是有问题的 Activity (为了缩小问题范围，我已将其简化):

public class UserAuthenticationActivity extends Activity {
    /** Called when the activity is first created. */

    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.e("MYAPP", "step1");
        super.onCreate(savedInstanceState);
         setContentView(R.layout.user_authentication);
        Log.e("MYAPP", "step2");
    }

    @Override    
    public void onStart()
    {
        super.onStart();
    }
}

这是布局/用户身份验证:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollbars="vertical"    
        android:padding="15sp"
        >  

    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="hello!"
        android:paddingTop="15sp"  
        android:paddingBottom="5sp"    
        android:textSize="15sp"        
        />    

    </LinearLayout>

</ScrollView>

启动应用程序时出现错误屏幕。日志不显示我的调试消息，只显示这个异常:

I/ActivityManager( 1032): Starting activity: Intent { comp={com.myapp.android.app/com.myapp.android.app.activity.UserAuthenticationActivity} }
D/Database( 1990): hook db is called for:/data/data/com.myapp.android.app/databases/myappDatabase.db
D/Database( 1990): hook not enabled for /data/data/com.myapp.android.app/databases/myappDatabase.db
E/QC-DSS-LIB(  981): unrecognized ifindex 6
W/dalvikvm( 1990): threadid=3: thread exiting with uncaught exception (group=0x4000fe70)
E/AndroidRuntime( 1990): Uncaught handler: thread main exiting due to uncaught exception
E/AndroidRuntime( 1990): java.lang.NullPointerException
E/AndroidRuntime( 1990):    at android.widget.ListView.measureScrapChild(ListView.java:1039)
E/AndroidRuntime( 1990):    at android.widget.ListView.measureHeightOfChildren(ListView.java:1120)
E/AndroidRuntime( 1990):    at android.widget.ListView.onMeasure(ListView.java:1031)
E/AndroidRuntime( 1990):    at android.view.View.measure(View.java:7236)
E/AndroidRuntime( 1990):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2875)
E/AndroidRuntime( 1990):    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:888)
E/AndroidRuntime( 1990):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:350)
E/AndroidRuntime( 1990):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
E/AndroidRuntime( 1990):    at android.view.View.measure(View.java:7236)
E/AndroidRuntime( 1990):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2875)
E/AndroidRuntime( 1990):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
E/AndroidRuntime( 1990):    at android.view.View.measure(View.java:7236)
E/AndroidRuntime( 1990):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:464)
E/AndroidRuntime( 1990):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
E/AndroidRuntime( 1990):    at android.view.View.measure(View.java:7236)
E/AndroidRuntime( 1990):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2875)
E/AndroidRuntime( 1990):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
E/AndroidRuntime( 1990):    at android.view.View.measure(View.java:7236)
E/AndroidRuntime( 1990):    at android.view.ViewRoot.performTraversals(ViewRoot.java:698)
E/AndroidRuntime( 1990):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1482)
E/AndroidRuntime( 1990):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1990):    at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 1990):    at android.app.ActivityThread.main(ActivityThread.java:3948)
E/AndroidRuntime( 1990):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1990):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 1990):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
E/AndroidRuntime( 1990):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
E/AndroidRuntime( 1990):    at dalvik.system.NativeStart.main(Native Method)

我希望有人能帮助我。我没有任何线索。

谢谢，
丹

Answer 1

会不会是因为没有contentview？

其他兴趣点:

• 您的 ScrollView 中有多个 View ，但它只能有一个 subview (使用线性布局之类的东西可以在其中放置多个 View )
• 您的 list 看起来如何？那里宣布了哪些 Activity ？ (或者，正如@kcoppock 所说:这是你唯一的 Activity 吗？)
• 为什么它会从 .widget 中抛出东西？你在使用什么？进口？