LogCat问题
LogCat问题
提问于 2014-01-27 04:06:42
我正在阅读专业的Android 2应用程序开发，并制作了一个站在那里的应用程序。但是当我启动avd并运行avd时，弹出这个:不幸的是，地震已经停止了。在eclipse中，logcat弹出，我得到这个错误消息：
01-26 19:59:11.153: W/dalvikvm(859): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
01-26 19:59:11.183: E/AndroidRuntime(859): FATAL EXCEPTION: main
01-26 19:59:11.183: E/AndroidRuntime(859): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.epstudios.earthquake/com.epstudios.earthquake.Earthquake}: android.os.NetworkOnMainThreadException
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread.access$600(ActivityThread.java:130)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.os.Handler.dispatchMessage(Handler.java:99)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.os.Looper.loop(Looper.java:137)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-26 19:59:11.183: E/AndroidRuntime(859): at java.lang.reflect.Method.invokeNative(Native Method)
01-26 19:59:11.183: E/AndroidRuntime(859): at java.lang.reflect.Method.invoke(Method.java:511)
01-26 19:59:11.183: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-26 19:59:11.183: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-26 19:59:11.183: E/AndroidRuntime(859): at dalvik.system.NativeStart.main(Native Method)
01-26 19:59:11.183: E/AndroidRuntime(859): Caused by: android.os.NetworkOnMainThreadException
01-26 19:59:11.183: E/AndroidRuntime(859): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
01-26 19:59:11.183: E/AndroidRuntime(859): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
01-26 19:59:11.183: E/AndroidRuntime(859): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
01-26 19:59:11.183: E/AndroidRuntime(859): at java.net.InetAddress.getAllByName(InetAddress.java:214)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
01-26 19:59:11.183: E/AndroidRuntime(859): at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:486)
01-26 19:59:11.183: E/AndroidRuntime(859): at com.epstudios.earthquake.Earthquake.refreshEarthquakes(Earthquake.java:71)
01-26 19:59:11.183: E/AndroidRuntime(859): at com.epstudios.earthquake.Earthquake.onCreate(Earthquake.java:57)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.Activity.performCreate(Activity.java:5008)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
01-26 19:59:11.183: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
01-26 19:59:11.183: E/AndroidRuntime(859): ... 11 more问题出在哪里？
回答 2
Stack Overflow用户
发布于 2014-01-27 04:11:18
这本书似乎是为老版本的Android编写的。现在默认情况下禁止在主线程上执行网络任务。可以通过在应用程序开始时调用以下命令来恢复旧版Android的策略：
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy); 请注意，一般情况下，您应该使用后台线程进行联网。
Stack Overflow用户
发布于 2014-01-27 04:09:25
logcat中的第一行...
主线程上不能有网络内容，您需要对其进行异步任务包装
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/21368551
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