StrictMode.StrictMode$AndroidBlockGuardPolicy.onNetwork

最新推荐文章于 2021-05-30 20:14:50 发布
原创 最新推荐文章于 2021-05-30 20:14:50 发布 · 3.7k 阅读 · 1 ·
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本文介绍如何在Android 3.0及以上版本中取消对主线程进行网络操作的限制。通过设置StrictMode策略允许所有网络请求在主线程中执行。
android3.0以上凡是涉及到网络，下载等耗时操作，都不能在主线程中运行，加上以下代码，可以取消严格限制

StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();
  StrictMode.setThreadPolicy(policy);

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使用StrictMode-StrictMode原理(1)
怪蜀黍
06-23 809
StrictMode如何使用，StrictMode原理，StrictMode入门
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at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(错误
fay8048的博客
02-22 6482
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork( 这样的错误。可能是android系统版本的问题 在3.0以后，不允许在主线成中访问网络。
android下的android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork错误
luotong86的专栏
03-03 1714
今天想在Android下，用httpClient去获取网页的内容，结果在httpClient处报了错，android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145), libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84), libcore.io.IoBr...
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork
HAPP NEW JAVA
04-15 2089
单词学习： Strict: adj.精确的; 绝对的; 严格的，严谨的; [植]笔直的 Block: n.块; 街区; 大楼，大厦; 障碍物，阻碍;  vt.阻止; 阻塞; 限制;  Guard: n.警卫; 狱吏，看守; 护卫队; 防护装置;  vt.保卫，守护; 看守; 加防护装置; 谨慎使用;  vi.警惕; 警卫; 
android错误：at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork
u013905744的专栏
05-16 2019
Android的官方文档给出了这个类设置的目的： StrictMode是一个系统提供的开发工具，用以检测在开发过程中因为偶然的事故从而造成的系统潜在的问题，进而提示开发者对其进行修复。 StrictMode通常用于捕获磁盘访问或者网络访问中与主进程之间交互产生的问题，因为在主进程中，UI操作和一些动作的执行是最经常用到的，它们之间会产生一定的冲突问题。将磁盘访问和网络访问从主线程中剥离可以使磁
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.test_differ_kalman, PID: 32648 android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1668) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:389) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:230) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:212) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:436) at java.net.Socket.connect(Socket.java:621) at com.example.poslib.PosLib.startThread(PosLib.java:197) at com.example.test_differ_kalman.MyFragment$1.onClick(MyFragment.java:48)
07-12
根据您提供的错误日志，可以看出发生了 `android.os.NetworkOnMainThreadException` 异常。这个异常通常在主线程上执行了网络操作时抛出，因为在 Android 中，主线程主要用于处理 UI 相关的操作，不允许在主线程上...
使用aar包中的线程连接socket，无法连接出现E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.test_differ_kalman, PID: 12202 android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1571) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:389) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:230) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:212) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:436) at java.net.Socket.connect(Socket.java:621) at com.example.poslib.PosLib.startThread(PosLib.java:192) at com.example.test_differ_kalman.MyFragment$1.onClick(MyFragment.java:48)
07-12
根据您提供的错误日志，可以看到同样出现了 `android.os.NetworkOnMainThreadException` 异常。这个异常说明您的网络连接操作仍然在主线程中执行，而不是在后台线程中。 这可能是由于您的 `PosLib` 类的 `...
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); new ConnectTask().execute(ip, String.valueOf(port)); } }); Button sendMessageButton = findViewById(R.id.sendMessageButton); sendMessageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showSendMessageDialog(); } }); }出现E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.rlswj, PID: 16184 android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1668) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:116) at java.net.SocketOutputStream.write(SocketOutputStream.java:161) at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221) at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at java.io.PrintWriter.newLine(PrintWriter.java:482) at java.io.PrintWriter.println(PrintWriter.java:629) at java.io.PrintWriter.println(PrintWriter.java:670)
06-01
这个错误信息与你之前提到的错误信息相同，都是由于在主线程中进行了网络操作导致的。你需要将网络操作放到单独的线程或使用异步任务来执行，例如在 `ConnectTask` 中执行网络操作，而不是在主线程中执行。...
I/PCLog_: [com.naz.label.util.ActivityLifecycleUtils$FLC.onFragmentPaused(ActivityLifecycleUtils.java:178)] f-->ReaderCfgFragment{9c646c5} (d088ffd2-e5cc-4038-b466-a21015651526) id=0xffffffff} I/PCLog_: [com.naz.label.util.ActivityLifecycleUtils$FLC.onFragmentViewDestroyed(ActivityLifecycleUtils.java:186)] f-->ReaderCfgFragment{9c646c5} (d088ffd2-e5cc-4038-b466-a21015651526) id=0xffffffff} I/PCLog_: [com.naz.label.util.ActivityLifecycleUtils$FLC.onFragmentPaused(ActivityLifecycleUtils.java:178)] f-->SelectTagFragment{3903f2f} (68ef1e25-34ae-410b-bf3c-1c3b56b6fccb) id=0xffffffff} I/PCLog_: [com.naz.label.util.ActivityLifecycleUtils$FLC.onFragmentViewDestroyed(ActivityLifecycleUtils.java:186)] f-->SelectTagFragment{3903f2f} (68ef1e25-34ae-410b-bf3c-1c3b56b6fccb) id=0xffffffff} W/m.uhf.rfid.deme: Accessing hidden method Ldalvik/system/CloseGuard;->get()Ldalvik/system/CloseGuard; (unsupported,core-platform-api, reflection, allowed) Accessing hidden method Ldalvik/system/CloseGuard;->open(Ljava/lang/String;)V (unsupported,core-platform-api, reflection, allowed) Accessing hidden method Ldalvik/system/CloseGuard;->warnIfOpen()V (unsupported,core-platform-api, reflection, allowed) D/CompatibilityChangeReporter: Compat change id reported: 247079863; UID 10123; state: DISABLED D/TrafficStats: tagSocket(103) with statsTag=0xffffffff, statsUid=-1 W/m.uhf.rfid.deme: Accessing hidden method Lcom/android/org/conscrypt/ConscryptEngineSocket;->setUseSessionTickets(Z)V (max-target-q,core-platform-api, reflection, allowed) W/m.uhf.rfid.deme: Accessing hidden method Lcom/android/org/conscrypt/ConscryptEngineSocket;->setHostname(Ljava/lang/String;)V (max-target-q,core-platform-api, reflection, allowed) Accessing hidden method Lcom/android/org/conscrypt/OpenSSLSocketImpl;->setAlpnProtocols([B)V (max-target-q,core-platform-api, reflection, allowed) W/m.uhf.rfid.deme: Accessing hidden method Lcom/android/org/conscrypt/OpenSSLSocketImpl;->getAlpnSelectedProtocol()[B (max-target-q,core-platform-api, reflection, allowed) W/m.uhf.rfid.deme: Got a deoptimization request on un-deoptimizable method java.lang.Object java.lang.Class.newInstance() W/m.uhf.rfid.deme: Got a deoptimization request on un-deoptimizable method java.net.InetAddress[] libcore.io.Linux.android_getaddrinfo(java.lang.String, android.system.StructAddrinfo, int) D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main Process: com.uhf.rfid.deme, PID: 24085 android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1675) at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:115) at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103) at java.net.InetAddress.getAllByName(InetAddress.java:1152) at com.android.okhttp.Dns$1.lookup(Dns.java:41) at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:178) at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:144) at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:86) at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:176) at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128) at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97) at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289) at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:542) at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseCode(DelegatingHttpsURLConnection.java:106) at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:30) at com.naz.label.fragments.home.cow.CowFragment.onViewCreated(CowFragment.java:67) at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:322) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1185) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1354) at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1432) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1495) at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447) at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2167) at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1990) at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1945) at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1847) at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:413) at android.os.Handler.handleCallback(Handler.java:1003) at android.os.Handler.dispatchMessage(Handler.java:108) at android.os.Looper.loopOnce(Looper.java:205) at android.os.Looper.loop(Looper.java:294) at android.app.ActivityThread.main(ActivityThread.java:8214) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1187) E/PCLog_: catchInfo-------------> [com.naz.label.ErrorReport.handleException(ErrorReport.java:51)] android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1675) at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:115) at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103) at java.net.InetAddress.getAllByName(InetAddress.java:1152) at com.android.okhttp.Dns$1.lookup(Dns.java:41) at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:178) at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:144) at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:86) at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:176) at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128) at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97) at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289) at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411) at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:542) at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseCode(DelegatingHttpsURLConnection.java:106) at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:30) at com.naz.label.fragments.home.cow.CowFragment.onViewCreated(CowFragment.java:67) at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:322) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1185) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1354) at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1432) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1495) at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447) at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2167) at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1990) at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1945) at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1847) at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:413) at android.os.Handler.handleCallback(Handler.java:1003) at android.os.Handler.dispatchMessage(Handler.java:108) at android.os.Looper.loopOnce(Looper.java:205) at android.os.Looper.loop(Looper.java:294) at android.app.ActivityThread.main(ActivityThread.java:8214) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1187) D/module_manager: Opening value = 0 devNo = 0 D/module_manager: Open success! fd = 112--1 type = 1-0 ret = 1 D/serial_port: close(fd = 113) I/m.uhf.rfid.deme: type=1400 audit(0.0:7570): avc: denied { ioctl } for path="/dev/rfid" dev="tmpfs" ino=651 ioctlcmd=0xf402 scontext=u:r:untrusted_app_27:s0:c123,c256,c512,c768 tcontext=u:object_r:device:s0 tclass=chr_file permissive=1 app=com.uhf.rfid.deme I/PCLog_: [com.naz.label.util.ActivityLifecycleUtils.finishAll(ActivityLifecycleUtils.java:76)] finishAll->[] I/m.uhf.rfid.deme: System.exit called, status: 0 I/AndroidRuntime: VM exiting with result code 0, cleanup skipped. Disconnected from the target VM, address: 'localhost:56646', transport: 'socket' 这个报错代码是在执行到int responseCode = connection.getResponseCode();这句代码发生的，请问这是怎么回事，怎么处理
最新发布
09-27
我们已经了解用户的问题：在Android中执行`int responseCode = connection.getResponseCode();`时出现`android.os.NetworkOnMainThreadException`错误的原因及处理方法。根据用户提供的引用内容，我们可以总结如下：...
Android用HTTP下载报错“android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork”
HuntCode的专栏
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此错误是因为Android不能在主线程中访问网络导致，可将访问网络代码另启线程运行：Runnable r = new Runnable() { @Override public void run() { // TODO Auto-generated method stub try { URL url = new URL(strURL);
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you have to insert 2 lines "StrictMode" on MainActivity Class, example's below:public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(s...
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错误：StrictMode $ AndroidBlockGuardPolicy.onNetwork
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首次安装会出现问题 第二次启动能正常http通信 不知道原因 if (android.os.Build.VERSION.SDK_INT > 9) { StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); } 或这个 ： Thread thread = new Thread(new
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转载地址:http://android-performance.com/android/2014/04/24/android-strict-mode.html StrictMode类是Android 2.3 （API 9）引入的一个工具类，可以用来帮助开发者发现代码中的一些不规范的问题。比如，如果你在UI线程中进行了网络或者磁盘操作，StrictMode就会通过Log（logcat ）或者对
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2019独角兽企业重金招聘Python工程师标准>>> ...
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