android.os.NetworkOnMainThreadException異常如何解決

android.os.NetworkOnMainThreadException08-08 17:53:30.635 I/ArticleTable(22461): 添加成功 5808-08 17:53:30.648 W/System.err(22461): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)08-08 17:53:30.648 W/System.err(22461): at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:163)08-08 17:53:30.649 W/System.err(22461): at libcore.io.IoBridge.recvfrom(IoBridge.java:545)08-08 17:53:30.649 W/System.err(22461): at java.net.PlainSocketImpl.read(PlainSocketImpl.java:489)08-08 17:53:30.649 W/System.err(22461): at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)08-08 17:53:30.649 W/System.err(22461): at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)08-08 17:53:30.649 W/System.err(22461): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:168)08-08 17:53:30.649 W/System.err(22461): at java.io.BufferedInputStream.read(BufferedInputStream.java:227)08-08 17:53:30.649 W/System.err(22461): at libcore.net.http.HttpConnection.isStale(HttpConnection.java:256)08-08 17:53:30.649 W/System.err(22461): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:71)08-08 17:53:30.649 W/System.err(22461): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:280)08-08 17:53:30.650 W/System.err(22461): at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:174)08-08 17:53:30.650 W/System.err(22461): at com.golfsec.util.DownloadUtil.downloadFile(DownloadUtil.java:101)08-08 17:53:30.650 W/System.err(22461): at com.golfsec.handler.notice.ArticleHttpHandler$AttachHandler1.handleMessage(ArticleHttpHandler.java:543)08-08 17:53:30.650 W/System.err(22461): at android.os.Handler.dispatchMessage(Handler.java:99)08-08 17:53:30.650 W/System.err(22461): at android.os.Looper.loop(Looper.java:154)08-08 17:53:30.652 W/System.err(22461): at android.app.ActivityThread.main(ActivityThread.java:4624)08-08 17:53:30.652 W/System.err(22461): at java.lang.reflect.Method.invokeNative(Native Method)08-08 17:53:30.652 W/System.err(22461): at java.lang.reflect.Method.invoke(Method.java:511)08-08 17:53:30.652 W/System.err(22461): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:965)08-08 17:53:30.652 W/System.err(22461): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:732)08-08 17:53:30.653 W/System.err(22461): at dalvik.system.NativeStart.main(Native Method)

在做android開發 大家也會經常莫名其妙遇到各種問題，今天遇到這個問題也很奇怪，項目一直採用的是android sdk2.2開發

上一個app沒有出現如題的問題，但這個版本卻出現了，後來在網上看有說添加代碼

         詳見StrictMode文檔        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()                .detectDiskReads()                .detectDiskWrites()                .detectNetwork()   // or .detectAll() for all detectable problems                .penaltyLog()                .build());        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()                .detectLeakedSqlLiteObjects()                .detectLeakedClosableObjects()                .penaltyLog()                .penaltyDeath()                .build());

這樣也可以解決問題，但sdk就不能採用2.2了

還有種解決辦法就是在AndroidManifest.xml 裡面進行配置

最近之所以出現這樣問題是我在裡面這樣寫的

   <uses-sdk        android:minSdkVersion="3"        android:targetSdkVersion="14" />

出現了問題

後來改為

   <uses-sdk        android:minSdkVersion="3"        android:targetSdkVersion="8" />

這樣就可以了！