Android调试中遇到的bug

来源：互联网发布：离散傅里叶矩阵编辑：程序博客网时间：2024/05/01 10:47

09-11 14:39:52.120: ERROR/AndroidRuntime(12051): FATAL EXCEPTION: Thread-431
09-11 14:39:52.120: ERROR/AndroidRuntime(12051): Process: com.clockrock.freeshare, PID: 12051
09-11 14:39:52.120: ERROR/AndroidRuntime(12051): java.lang.NullPointerException: println needs a message
09-11 14:39:52.120: ERROR/AndroidRuntime(12051): at android.util.Log.println_native(Native Method)
09-11 14:39:52.120: ERROR/AndroidRuntime(12051): at android.util.Log.i(Log.java:160)
09-11 14:39:52.120: ERROR/AndroidRuntime(12051): at com.clockrock.freeshare.MyPublishActivity$5.run(MyPublishActivity.java:214)

09-11 14:39:52.120: ERROR/AndroidRuntime(12051): at java.lang.Thread.run(Thread.java:848)

错误原因是因为：输出的log内容没有初始化，

09-11 15:29:43.832: WARN/System.err(13065): org.json.JSONException: No value for likeCnt
09-11 15:29:43.832: WARN/System.err(13065): at org.json.JSONObject.get(JSONObject.java:355)
09-11 15:29:43.832: WARN/System.err(13065): at org.json.JSONObject.getString(JSONObject.java:515)
09-11 15:29:43.832: WARN/System.err(13065): at com.clockrock.tools.HttpTools.getMyPubData(HttpTools.java:616)
09-11 15:29:43.832: WARN/System.err(13065): at com.clockrock.freeshare.MyPublishActivity$4.run(MyPublishActivity.java:196)
09-11 15:29:43.832: WARN/System.err(13065): at java.lang.Thread.run(Thread.java:848)

错误原因：我在解析json 字符串的时候，返回来的键值和我optString的设置没有一致

09-11 15:33:04.697: WARN/dalvikvm(13180): threadid=13: uncaught exception occurred
09-11 15:33:04.697: WARN/System.err(13180): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
09-11 15:33:04.700: WARN/System.err(13180): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
09-11 15:33:04.701: WARN/System.err(13180): at java.util.ArrayList.set(ArrayList.java:481)
09-11 15:33:04.701: WARN/System.err(13180): at com.clockrock.tools.HttpTools.getMyPubData(HttpTools.java:620)
09-11 15:33:04.701: WARN/System.err(13180): at com.clockrock.freeshare.MyPublishActivity$3.run(MyPublishActivity.java:145)
09-11 15:33:04.701: WARN/System.err(13180): at java.lang.Thread.run(Thread.java:848)
09-11 15:33:04.701: WARN/dalvikvm(13180): threadid=13: calling UncaughtExceptionHandler
09-11 15:33:04.701: INFO/dalvikvm(13180): +++ calling Ljava/lang/ThreadGroup;.uncaughtException
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): FATAL EXCEPTION: Thread-438
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): Process: com.clockrock.freeshare, PID: 13180
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): at java.util.ArrayList.set(ArrayList.java:481)
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): at com.clockrock.tools.HttpTools.getMyPubData(HttpTools.java:620)
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): at com.clockrock.freeshare.MyPublishActivity$3.run(MyPublishActivity.java:145)
09-11 15:33:04.701: ERROR/AndroidRuntime(13180): at java.lang.Thread.run(Thread.java:848)

错误原因是：我定义了一个数组，我插入数据的时候用了set,而不是用的add方法我好傻

09-11 15:33:04.703: WARN/ActivityManager(743): Force finishing activity com.clockrock.freeshare/.MyPublishActivity

09-11 15:36:35.758: WARN/System.err(743): java.lang.SecurityException: Neither user 10003 nor current process has android.permission.PACKAGE_USAGE_STATS.
09-11 15:36:35.758: WARN/System.err(743): at android.app.ContextImpl.enforce(ContextImpl.java:1876)
09-11 15:36:35.758: WARN/System.err(743): at android.app.ContextImpl.enforceCallingOrSelfPermission(ContextImpl.java:1905)
09-11 15:36:35.758: WARN/System.err(743): at com.android.server.am.UsageStatsService.getAllPkgUsageStats(UsageStatsService.java:862)
09-11 15:36:35.758: WARN/System.err(743): at com.android.internal.app.IUsageStats$Stub.onTransact(IUsageStats.java:113)
09-11 15:36:35.758: WARN/System.err(743): at android.os.Binder.execTransact(Binder.java:404)
09-11 15:36:35.759: WARN/System.err(743): at dalvik.system.NativeStart.run(Native Method)

这个其实不是问题，我也没有找到解决方案，但是我重新调试的时候就不报这个警告了主要的原因估计还是我其他的地方错误了，listView的问题

今天好像又碰到了我一开始学Android写listView的问题，就是创建一个adapter类的时候只知道吧getView写了而把那些getCount给掉了，最后程序也不报错，数据访问也没有问题，哎，跟踪了好久才发现这个问题，

我只想说一句很多时候我们总是在不经意间回到原点。

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