启动应用程序时，我实际上遇到了动画问题。 问题是，当我尝试使用res文件夹的anim子文件夹中声明的动画启动应用程序时，应用程序将在启动时崩溃。任何人都可以指出我真的很奇怪吗？谢谢！ ：）
logcat的：
07-28 17:14:12.588: D/AndroidRuntime(317): Shutting down VM
07-28 17:14:12.588: W/dalvikvm(317): threadid=1: thread exiting with uncaught exception (group=0x419146d8)
07-28 17:14:12.588: E/AndroidRuntime(317): FATAL EXCEPTION: main
07-28 17:14:12.588: E/AndroidRuntime(317): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.one/com.app.one.MainActivity}: java.lang.NullPointerException
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2194)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2244)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread.access$600(ActivityThread.java:149)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.os.Handler.dispatchMessage(Handler.java:99)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.os.Looper.loop(Looper.java:213)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread.main(ActivityThread.java:5092)
07-28 17:14:12.588: E/AndroidRuntime(317): at java.lang.reflect.Method.invokeNative(Native Method)
07-28 17:14:12.588: E/AndroidRuntime(317): at java.lang.reflect.Method.invoke(Method.java:511)
07-28 17:14:12.588: E/AndroidRuntime(317): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:797)
07-28 17:14:12.588: E/AndroidRuntime(317): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:564)
07-28 17:14:12.588: E/AndroidRuntime(317): at dalvik.system.NativeStart.main(Native Method)
07-28 17:14:12.588: E/AndroidRuntime(317): Caused by: java.lang.NullPointerException
07-28 17:14:12.588: E/AndroidRuntime(317): at com.app.one.MainActivity.onCreate(MainActivity.java:29)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.Activity.performCreate(Activity.java:5104)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-28 17:14:12.588: E/AndroidRuntime(317): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2158)
07-28 17:14:12.588: E/AndroidRuntime(317): ... 11 more
07-28 17:14:13.809: I/Process(317): Sending signal. PID: 317 SIG: 9
关于xmls我相信他们没事。