【发布时间】：2011-05-17 03:20:57
【问题描述】：
我正在构建一个 Android 应用，使用一堆 switch 语句在视图之间切换。一切都很顺利，直到我添加了一个在应用程序启动时导致致命错误的案例。这些案例由 XML 中的 onClick 语句调用。有问题的案例块实际上是可以正常工作的语句块的一部分。谁能看到我错过了什么？是什么导致了致命错误？我在 logCat 文件中包含了损坏代码和工作代码的 sn-ps。
05-17 01:48:01.931: INFO/System.out(270): debugger has settled (1381)
05-17 01:48:02.341: WARN/dalvikvm(270): VFY: invalid switch target 7170 (-> 0x1c0b) at 0x9[0]
05-17 01:48:02.351: WARN/dalvikvm(270): VFY: rejected Lcom/findthway/main;.nextLayout (Landroid/view/View;)V
05-17 01:48:02.351: WARN/dalvikvm(270): Verifier rejected class Lcom/findthway/main;
05-17 01:48:02.351: WARN/dalvikvm(270): Class init failed in newInstance call (Lcom/findthway/main;)
05-17 01:48:03.031: INFO/ActivityManager(67): Displayed activity com.android.launcher/com.android.launcher2.Launcher: 50893 ms (total 50893 ms)
05-17 01:48:08.001: WARN/ActivityManager(67): Launch timeout has expired, giving up wake lock!
05-17 01:48:08.751: WARN/ActivityManager(67): Activity idle timeout for HistoryRecord{43eda500 com.findthway/.main}
05-17 01:52:41.531: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 01:57:41.551: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:02:41.576: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:07:41.641: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:08:45.831: DEBUG/dalvikvm(67): GC_FOR_MALLOC freed 15592 objects / 665856 bytes in 160ms
05-17 02:12:41.695: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:16:30.392: DEBUG/dalvikvm(67): GC_FOR_MALLOC freed 4697 objects / 200928 bytes in 108ms
05-17 02:17:41.716: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:22:41.745: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:27:41.801: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:32:41.812: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:37:41.851: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol
05-17 02:41:00.341: DEBUG/dalvikvm(67): GC_FOR_MALLOC freed 12690 objects / 520224 bytes in 235ms
将调用损坏的 switch 案例的 XML 示例：
<RelativeLayout android:id="@+id/level07_layout00"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/vlayoutup"
android:visibility="gone">
<ImageButton android:id="@+id/level07_closeButton00"
android:layout_height="wrap_content"
android:background="@drawable/close"
android:layout_width="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp"
android:onClick="closetomain">
</ImageButton>
<ImageButton android:id="@+id/level07_leftButton00"
android:layout_height="wrap_content"
android:background="@drawable/node"
android:layout_width="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="2dp"
android:layout_marginLeft="135dp"
android:onClick="nextLayout">
</ImageButton>
<ImageButton android:id="@+id/level07_rightButton00"
android:layout_height="wrap_content"
android:background="@drawable/node"
android:layout_width="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="2dp"
android:layout_marginLeft="340dp"
android:onClick="nextLayout">
</ImageButton>
<ImageView android:id="@+id/level07_beginButton00"
android:layout_height="wrap_content"
android:background="@drawable/beginbutton"
android:layout_width="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="2dp"
android:layout_marginLeft="235dp">
</ImageView>
<ImageView android:id="@+id/level07_ImageView00"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="5dp"
android:layout_marginLeft="325dp"
android:background="@drawable/rocket">
</ImageView>
</RelativeLayout>
<RelativeLayout android:id="@+id/level07_layout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/vlayoutup"
android:visibility="gone">
<ImageButton android:id="@+id/level07_closeButton01"
android:layout_height="wrap_content"
android:background="@drawable/close"
android:layout_width="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp"
android:onClick="closetomain">
</ImageButton>
<ImageButton android:id="@+id/level07_leftButton01"
android:layout_height="wrap_content"
android:background="@drawable/node"
android:layout_width="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="2dp"
android:layout_marginLeft="135dp"
android:onClick="nextLayout">
</ImageButton>
<ImageButton android:id="@+id/level07_rightButton01"
android:layout_height="wrap_content"
android:background="@drawable/node"
android:layout_width="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="2dp"
android:layout_marginLeft="340dp"
android:onClick="nextLayout">
</ImageButton>
<ImageButton android:id="@+id/level07_backButton01"
android:layout_height="wrap_content"
android:background="@drawable/backlevel"
android:layout_width="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="2dp"
android:layout_marginLeft="235dp"
android:onClick="prevLayout">
</ImageButton>
</RelativeLayout>
这是损坏的java的sn-p：
case R.id.level07_backButton01:
RelativeLayout bB017 = (RelativeLayout)findViewById(R.id.level07_layout00);
bB017.setVisibility(View.VISIBLE);
RelativeLayout bB017b = (RelativeLayout)findViewById(R.id.level07_layout01);
bB017b.setVisibility(View.GONE);
break;
case R.id.level07_backButton02:
RelativeLayout bB027b = (RelativeLayout)findViewById(R.id.level07_layout01);
bB027b.setVisibility(View.VISIBLE);
RelativeLayout bB027 = (RelativeLayout)findViewById(R.id.level07_layout02);
bB027.setVisibility(View.GONE);
break;
case R.id.level07_backButton03:
RelativeLayout bB037 = (RelativeLayout)findViewById(R.id.level07_layout02);
bB037.setVisibility(View.VISIBLE);
RelativeLayout bB037b = (RelativeLayout)findViewById(R.id.level07_layout03);
bB037b.setVisibility(View.GONE);
break;
这是在同一块中工作的代码的 sn-p：
case R.id.level07_backButton16:
RelativeLayout bB167 = (RelativeLayout)findViewById(R.id.level07_layout15);
bB167.setVisibility(View.VISIBLE);
RelativeLayout bB167b = (RelativeLayout)findViewById(R.id.level07_layout16);
bB167b.setVisibility(View.GONE);
break;
case R.id.level07_backButton17:
RelativeLayout bB177 = (RelativeLayout)findViewById(R.id.level07_layout13);
bB177.setVisibility(View.VISIBLE);
RelativeLayout bB177b = (RelativeLayout)findViewById(R.id.level07_layout17);
bB177b.setVisibility(View.GONE);
break;
case R.id.level07_backButton18:
RelativeLayout bB187 = (RelativeLayout)findViewById(R.id.level07_layout17);
bB187.setVisibility(View.VISIBLE);
RelativeLayout bB187b = (RelativeLayout)findViewById(R.id.level07_layout18);
bB187b.setVisibility(View.GONE);
break;
如您所见，我认为这两个 switch case 块是相同的。我认为重要线索的部分在 logCat: VFY: invalid switch target 中。
如果您需要更多信息，请告诉我。提前感谢您的帮助！
【问题讨论】：
-
我没有看到 backButton02 或 03 定义。 （或后来的 16/17/18 - 这是整个 xml 吗？
-
这不是整个 XML，只是一个示例。这几乎是一堆相似的块，但它们都有相同的图像按钮，用于返回、关闭和下一步。
-
你在这个 xml 中有多少视图？有多少布局？假设您在 Button02 或 Button03 上的 xml 中没有错字，您是否可能超出了 #of 视图或布局的限制？
-
jkhouw1 - 你在正确的轨道上，但事实证明情况太多了。谁知道？我以前从未见过这种情况，但这只是我在 Java 上的第二次尝试。
标签： android xml view onclick switch-statement