问题描述
- 安卓虚拟机总是出现Unfortunately,xxxxxxxx has stopped
-
是按照《第一行代码》写的,改成跟书上一模一样还出现这个,求指导03-15 05:31:41.660: D/gralloc_goldfish(1692): Emulator without GPU emulation detected. 03-15 05:31:45.230: D/AndroidRuntime(1692): Shutting down VM 03-15 05:31:45.230: W/dalvikvm(1692): threadid=1: thread exiting with uncaught exception (group=0xb4abfba8) 03-15 05:31:45.280: E/AndroidRuntime(1692): FATAL EXCEPTION: main 03-15 05:31:45.280: E/AndroidRuntime(1692): Process: com.example.uiwidgettest, PID: 1692 03-15 05:31:45.280: E/AndroidRuntime(1692): java.lang.NullPointerException 03-15 05:31:45.280: E/AndroidRuntime(1692): at com.example.uiwidgettest.MainActivity.onClick(MainActivity.java:48) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.view.View.performClick(View.java:4438) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.view.View$PerformClick.run(View.java:18422) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.os.Handler.handleCallback(Handler.java:733) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.os.Handler.dispatchMessage(Handler.java:95) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.os.Looper.loop(Looper.java:136) 03-15 05:31:45.280: E/AndroidRuntime(1692): at android.app.ActivityThread.main(ActivityThread.java:5001) 03-15 05:31:45.280: E/AndroidRuntime(1692): at java.lang.reflect.Method.invokeNative(Native Method) 03-15 05:31:45.280: E/AndroidRuntime(1692): at java.lang.reflect.Method.invoke(Method.java:515) 03-15 05:31:45.280: E/AndroidRuntime(1692): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 03-15 05:31:45.280: E/AndroidRuntime(1692): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 03-15 05:31:45.280: E/AndroidRuntime(1692): at dalvik.system.NativeStart.main(Native Method)
解决方案
java.lang.NullPointerException
at com.example.uiwidgettest.MainActivity.onClick(MainActivity.java:48)
48行包空指针
解决方案二:
看一下Logcat输出的信息,会有提示的
解决方案三:
贴日志,直接定位崩溃的原因
时间: 2024-08-18 22:19:24