java - Android 应用程序因代码错误而崩溃，不理解 logcat 消息

Question

我正在尝试处理这个 Android 源代码，它运行得很好，直到我将应用程序重构为不同的包名称。包资源管理器中没有显示任何错误，当我在 Debug模式下运行它时，这就是我在 logcat 中得到的结果:

09-04 21:57:07.544: INFO/ActivityManager(58): Starting activity: Intent { cmp=com.dalimited.zs/.Snake }
09-04 21:57:07.683: DEBUG/AndroidRuntime(387): Shutting down VM
09-04 21:57:07.683: WARN/dalvikvm(387): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
09-04 21:57:07.734: ERROR/AndroidRuntime(387): FATAL EXCEPTION: main
09-04 21:57:07.734: ERROR/AndroidRuntime(387): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dalimited.zs/com.dalimited.zs.Snake}: android.view.InflateException: Binary XML file line #21: Error inflating class com.example.android.snake.SnakeView
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.os.Looper.loop(Looper.java:123)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at java.lang.reflect.Method.invokeNative(Native Method)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at java.lang.reflect.Method.invoke(Method.java:521)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at dalvik.system.NativeStart.main(Native Method)
09-04 21:57:07.734: ERROR/AndroidRuntime(387): Caused by: android.view.InflateException: Binary XML file line #21: Error inflating class com.example.android.snake.SnakeView
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.Activity.setContentView(Activity.java:1647)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at com.dalimited.zs.Snake.onCreate(Snake.java:50)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     ... 11 more
09-04 21:57:07.734: ERROR/AndroidRuntime(387): Caused by: java.lang.ClassNotFoundException: com.example.android.snake.SnakeView in loader dalvik.system.PathClassLoader[/data/app/com.dalimited.zs-1.apk]
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.createView(LayoutInflater.java:466)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
09-04 21:57:07.734: ERROR/AndroidRuntime(387):     ... 20 more

我的问题是:这个 logcat 告诉我什么？我在代码中哪里可以找到我的问题？最后，是否有现成的信息可用于学习如何阅读 logcat？

Answer 1

Caused by: android.view.InflateException: Binary XML file line #21: Error inflating class com.example.android.snake.SnakeView

检查您的布局文件。您正在尝试创建您的 CustomView。你的 SnakeView 类扩展了 View 吗？

您可以引用此链接:http://www.anddev.org/creating_custom_views_-_the_togglebutton-t310.html