JSONObject不适用于Android 2.3但适用于Android 4.2,为什么？
发布时间：2020-12-16 19:32:26 所属栏目：百科 来源：网络整理
导读：我正在为 JSONObject请求服务器,它包含一些ID的列表.这适用于 Android 4.2,但不适用于Android 2.3(已在Device和Emulator上测试过.) JSONObject如下. {"IdList":[{"id":"004502"},{"id":"S007901"},{"id":"041501"},{"id":"S139001"}]} 这适用于4.2,但在2.3中
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我正在为
JSONObject请求服务器,它包含一些ID的列表.这适用于
Android 4.2,但不适用于Android 2.3(已在Device和Emulator上测试过.)
JSONObject如下. {"IdList":[{"id":"004502"},{"id":"S007901"},{"id":"041501"},{"id":"S139001"}]}
这适用于4.2,但在2.3中显示NullPointerException. 我的LogCat如下： org.json.JSONException: Value Nullpointer of type java.lang.String cannot be converted to JSONObject 06-06 11:23:46.881: W/System.err(1820): at org.json.JSON.typeMismatch(JSON.java:107) 06-06 11:23:46.893: W/System.err(1820): at org.json.JSONObject.<init>(JSONObject.java:158) 06-06 11:23:46.893: W/System.err(1820): at org.json.JSONObject.<init>(JSONObject.java:171) 06-06 11:23:46.893: W/System.err(1820): at my.Site.serverInterface.executeHttpRequest(serverInterface.java:128) 06-06 11:23:46.893: W/System.err(1820): at my.Site.serverInterface.getAtmId(serverInterface.java:54) 06-06 11:23:46.901: W/System.err(1820): at my.Site.TrackLocation$AtmGetter.doInBackground(TrackLocation.java:379) 06-06 11:23:46.901: W/System.err(1820): at android.os.AsyncTask$2.call(AsyncTask.java:185) 06-06 11:23:46.901: W/System.err(1820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 06-06 11:23:46.901: W/System.err(1820): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 06-06 11:23:46.901: W/System.err(1820): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 06-06 11:23:46.901: W/System.err(1820): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 06-06 11:23:46.901: W/System.err(1820): at java.lang.Thread.run(Thread.java:1019) 06-06 11:23:46.901: I/System.out(1820): null 06-06 11:23:46.912: I/System.out(1820)://e 06-06 11:23:46.912: W/System.err(1820): java.lang.NullPointerException 06-06 11:23:46.912: W/System.err(1820): at my.Site.TrackLocation$AtmGetter.doInBackground(TrackLocation.java:384) 06-06 11:23:46.912: W/System.err(1820): at android.os.AsyncTask$2.call(AsyncTask.java:185) 06-06 11:23:46.912: W/System.err(1820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 06-06 11:23:46.912: W/System.err(1820): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 06-06 11:23:46.912: W/System.err(1820): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 06-06 11:23:46.912: W/System.err(1820): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 06-06 11:23:46.912: W/System.err(1820): at java.lang.Thread.run(Thread.java:1019) 06-06 11:23:46.921: W/dalvikvm(1820): threadid=10: thread exiting with uncaught exception (group=0xb60c84f0) 06-06 11:23:46.931: E/AndroidRuntime(1820): FATAL EXCEPTION: AsyncTask #3 06-06 11:23:46.931: E/AndroidRuntime(1820): java.lang.RuntimeException: An error occured while executing doInBackground() 06-06 11:23:46.931: E/AndroidRuntime(1820): at android.os.AsyncTask$3.done(AsyncTask.java:200) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.lang.Thread.run(Thread.java:1019) 06-06 11:23:46.931: E/AndroidRuntime(1820): Caused by: java.lang.NullPointerException 06-06 11:23:46.931: E/AndroidRuntime(1820): at my.Site.TrackLocation$AtmGetter.doInBackground(TrackLocation.java:427) 06-06 11:23:46.931: E/AndroidRuntime(1820): at android.os.AsyncTask$2.call(AsyncTask.java:185) 06-06 11:23:46.931: E/AndroidRuntime(1820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 06-06 11:23:46.931: E/AndroidRuntime(1820): ... 4 more
只需将json库文件导入您的项目
http://www.json.org/java/index.html https://code.google.com/p/android-json-rpc/downloads/list （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |