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由于某种原因，在 Android 的清单文件中添加 uses-sdk 字段时会导致崩溃。我以前没有发生过这种情况，但我现在无法摆脱它。

清单文件的相关部分如下：

android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="15" />

<uses-permission android:name="android.permission.INTERNET"/>

<application

在 uses-sdk 子句上方或下方移动权限行没有区别，更改最低版本或目标版本也没有区别。无论选择什么（在合理范围内，因为我无法返回 API 8、10 或任何真正早期的级别），如果文件中包含 uses-sdk 子句，应用程序就会崩溃。

删除它允许它运行。

我得到的错误是“不幸的是 [app] 已停止”默认值，并且 logcat 列表中存在相关的“FATAL EXCEPTION：main”错误。

任何帮助或建议表示赞赏。

谢谢！

这是我正在阅读的一本书的一个例子（或者我应该说）。:)

我在下面添加了完整的 logcat 列表。

10-03 13:29:18.270: E/Trace(860): error opening trace file: No such file or directory (2)
10-03 13:29:18.950: D/AndroidRuntime(860): Shutting down VM
10-03 13:29:18.950: W/dalvikvm(860): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-03 13:29:18.960: E/AndroidRuntime(860): FATAL EXCEPTION: main
10-03 13:29:18.960: E/AndroidRuntime(860): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.paad.earthquake/com.paad.earthquake.Earthquake}: android.os.NetworkOnMainThreadException
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.os.Looper.loop(Looper.java:137)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread.main(ActivityThread.java:4745)
10-03 13:29:18.960: E/AndroidRuntime(860):  at java.lang.reflect.Method.invokeNative(Native Method)
10-03 13:29:18.960: E/AndroidRuntime(860):  at java.lang.reflect.Method.invoke(Method.java:511)
10-03 13:29:18.960: E/AndroidRuntime(860):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-03 13:29:18.960: E/AndroidRuntime(860):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-03 13:29:18.960: E/AndroidRuntime(860):  at dalvik.system.NativeStart.main(Native Method)
10-03 13:29:18.960: E/AndroidRuntime(860): Caused by: android.os.NetworkOnMainThreadException
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
10-03 13:29:18.960: E/AndroidRuntime(860):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
10-03 13:29:18.960: E/AndroidRuntime(860):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
10-03 13:29:18.960: E/AndroidRuntime(860):  at java.net.InetAddress.getAllByName(InetAddress.java:214)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
10-03 13:29:18.960: E/AndroidRuntime(860):  at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:486)
10-03 13:29:18.960: E/AndroidRuntime(860):  at com.paad.earthquake.EarthquakeListFragment.refreshEarthquakes(EarthquakeListFragment.java:77)
10-03 13:29:18.960: E/AndroidRuntime(860):  at com.paad.earthquake.EarthquakeListFragment.onActivityCreated(EarthquakeListFragment.java:55)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:848)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1017)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1802)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.Activity.performCreate(Activity.java:5011)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-03 13:29:18.960: E/AndroidRuntime(860):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-03 13:29:18.960: E/AndroidRuntime(860):  ... 11 more
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2 回答 2

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错误是NetworkOnMainThreadException 从 ICS 开始，您不能在主线程上进行任何网络访问。您可能应该使用 AsyncTask您进行网络访问的地方。

于 2012-10-03T17:39:56.857 回答
0

正如@Sameer 所说，您正在 Activity 的核心中进行网络调用。你永远不应该那样做。您活动的所有代码都在主线程上运行：用于 UI 的代码。您不应该对该线程进行任何繁重的计算：它会从 UI 中占用资源，使其滞后。http 调用更糟糕：只要您没有响应，UI 就会被阻止。

在 AsyncTask 中实现您的网络调用。

于 2012-10-03T21:03:59.603 回答