小编use*_*517的帖子

我写了这样一个应用程序(它仍在进行中......).这是日志:

10-02 13:38:18.714: D/AndroidRuntime(637): Shutting down VM
10-02 13:38:18.714: W/dalvikvm(637): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-02 13:38:18.734: E/AndroidRuntime(637): FATAL EXCEPTION: main
10-02 13:38:18.734: E/AndroidRuntime(637): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test1/com.example.test1.MainActivity}: java.lang.NullPointerException
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.os.Looper.loop(Looper.java:137)
10-02 13:38:18.734: E/AndroidRuntime(637):  at android.app.ActivityThread.main(ActivityThread.java:4745)
10-02 13:38:18.734: E/AndroidRuntime(637):  at java.lang.reflect.Method.invokeNative(Native Method)
10-02 13:38:18.734: E/AndroidRuntime(637):  at java.lang.reflect.Method.invoke(Method.java:511)
10-02 …