有啥办法可以在 Mac 上的 android studio 3.5.1 中修复这个错误
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【中文标题】有啥办法可以在 Mac 上的 android studio 3.5.1 中修复这个错误【英文标题】：Is there any way to fix this error in android studio 3.5.1 on Mac有什么办法可以在 Mac 上的 android studio 3.5.1 中修复这个错误 【发布时间】：2020-03-01 01:45:15 【问题描述】：我正在尝试从我的 android 应用程序下载网页内容。但是每当我跑步时，我都会遇到以下问题。我在 Mac 上使用的是 android studio 3.5.1。
这里有一些代码..
protected String doInBackground(String... urls)
String result = "";
URL url;
HttpURLConnection httpURLConnection= null;
try
url = new URL(urls[0]);
httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
InputStreamReader reader = new InputStreamReader(inputStream);
int data = reader.read();
while (data != -1)
char current = (char) data;
result += current;
data = reader.read();
return result;
catch (Exception e)
e.printStackTrace();
return "Failed";
以下是错误代码：
2019-11-04 23:43:52.801 19692-19692/? I/nloadwebconten: Not late-enabling -Xcheck:jni (already on)
2019-11-04 23:43:52.870 19692-19692/? E/nloadwebconten: Unknown bits set in runtime_flags: 0x8000
2019-11-04 23:43:52.872 19692-19692/? W/nloadwebconten: Unexpected CPU variant for X86 using defaults: x86
2019-11-04 23:43:53.355 19692-19721/com.example.downloadwebcontent D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
2019-11-04 23:43:53.340 19692-19692/com.example.downloadwebcontent W/RenderThread: type=1400 audit(0.0:147): avc: denied write for name="property_service" dev="tmpfs" ino=840 scontext=u:r:untrusted_app:s0:c136,c256,c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0
2019-11-04 23:43:53.356 19692-19721/com.example.downloadwebcontent W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied)
2019-11-04 23:43:53.386 19692-19721/com.example.downloadwebcontent D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
2019-11-04 23:43:53.406 19692-19721/com.example.downloadwebcontent D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
2019-11-04 23:43:53.464 19692-19721/com.example.downloadwebcontent D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
2019-11-04 23:43:53.680 19692-19692/com.example.downloadwebcontent W/nloadwebconten: Accessing hidden method Landroid/view/View;computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
2019-11-04 23:43:53.686 19692-19692/com.example.downloadwebcontent W/nloadwebconten: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
2019-11-04 23:43:53.815 19692-19727/com.example.downloadwebcontent D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2019-11-04 23:43:53.855 19692-19727/com.example.downloadwebcontent W/System.err: java.net.SocketException: socket failed: EPERM (Operation not permitted)
2019-11-04 23:43:53.856 19692-19727/com.example.downloadwebcontent W/System.err: at java.net.Socket.createImpl(Socket.java:492)
2019-11-04 23:43:53.856 19692-19727/com.example.downloadwebcontent W/System.err: at java.net.Socket.getImpl(Socket.java:552)
2019-11-04 23:43:53.856 19692-19727/com.example.downloadwebcontent W/System.err: at java.net.Socket.setSoTimeout(Socket.java:1180)
2019-11-04 23:43:53.865 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:143)
2019-11-04 23:43:53.865 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:116)
2019-11-04 23:43:53.865 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:186)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:248)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getInputStream(DelegatingHttpsURLConnection.java:211)
2019-11-04 23:43:53.866 19692-19727/com.example.downloadwebcontent W/System.err: at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:30)
2019-11-04 23:43:53.867 19692-19727/com.example.downloadwebcontent W/System.err: at com.example.downloadwebcontent.MainActivity$DownloadTask.doInBackground(MainActivity.java:28)
2019-11-04 23:43:53.867 19692-19727/com.example.downloadwebcontent W/System.err: at com.example.downloadwebcontent.MainActivity$DownloadTask.doInBackground(MainActivity.java:18)
2019-11-04 23:43:53.867 19692-19727/com.example.downloadwebcontent W/System.err: at android.os.AsyncTask$3.call(AsyncTask.java:378)
2019-11-04 23:43:53.867 19692-19727/com.example.downloadwebcontent W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
2019-11-04 23:43:53.871 19692-19727/com.example.downloadwebcontent W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:289)
2019-11-04 23:43:53.871 19692-19727/com.example.downloadwebcontent W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
2019-11-04 23:43:53.871 19692-19727/com.example.downloadwebcontent W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
2019-11-04 23:43:53.874 19692-19727/com.example.downloadwebcontent W/System.err: at java.lang.Thread.run(Thread.java:919)
2019-11-04 23:43:53.874 19692-19692/com.example.downloadwebcontent I/info: Failed
2019-11-04 23:43:54.118 19692-19717/com.example.downloadwebcontent D/HostConnection: HostConnection::get() New Host Connection established 0xd4b81f00, tid 19717
2019-11-04 23:43:54.122 19692-19717/com.example.downloadwebcontent D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_3_0
2019-11-04 23:43:54.145 19692-19717/com.example.downloadwebcontent W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2019-11-04 23:43:54.151 19692-19717/com.example.downloadwebcontent D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 0 0
2019-11-04 23:43:54.151 19692-19717/com.example.downloadwebcontent D/EGL_emulation: eglCreateContext: 0xe0204ec0: maj 3 min 0 rcv 3
2019-11-04 23:43:54.153 19692-19717/com.example.downloadwebcontent D/EGL_emulation: eglMakeCurrent: 0xe0204ec0: ver 3 0 (tinfo 0xe0234b90)
2019-11-04 23:43:54.200 19692-19717/com.example.downloadwebcontent W/Gralloc3: mapper 3.x is not supported
2019-11-04 23:43:54.204 19692-19717/com.example.downloadwebcontent D/HostConnection: createUnique: call
2019-11-04 23:43:54.205 19692-19717/com.example.downloadwebcontent D/HostConnection: HostConnection::get() New Host Connection established 0xd4b83760, tid 19717
2019-11-04 23:43:54.206 19692-19717/com.example.downloadwebcontent D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_3_0
2019-11-04 23:43:54.206 19692-19717/com.example.downloadwebcontent D/eglCodecCommon: allocate: Ask for block of size 0x1000
2019-11-04 23:43:54.207 19692-19717/com.example.downloadwebcontent D/eglCodecCommon: allocate: ioctl allocate returned offset 0x3ff803000 size 0x2000
2019-11-04 23:43:54.234 19692-19717/com.example.downloadwebcontent D/EGL_emulation: eglMakeCurrent: 0xe0204ec0: ver 3 0 (tinfo 0xe0234b90)
2019-11-04 23:43:54.243 19692-19717/com.example.downloadwebcontent D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 1 0
【问题讨论】：
你能分享整个堆栈跟踪吗？很难看出哪里出了问题。并且请保持相同的行尾，因为很难理解实际问题是什么。但似乎这是权限问题 -Permission denied
是的，我认为这是主要原因 2019-11-04 23:43:53.356 19692-19721/com.example.downloadwebcontent W/libc：无法将属性“qemu.gles”设置为“ 1"：连接失败； errno=13（权限被拒绝）
我谷歌了一下，发现了以下***.com/questions/56266801/…。一个人遇到的问题之一是缺少网络许可。对于一些从模拟器中卸载应用程序就足够了。
基本上我发现了两个失败的原因。一种可能是缺少网络权限，也可能与 SDK 安装有关。
【参考方案1】：
在AndroidManifest.xml的应用标签中添加如下标签
android:usesCleartextTraffic="true"
【讨论】：
我在我的 AndroidManifest.xml 中添加了该标签，它也给了我同样的错误。 那么请您发布您的清单并说明您的基本 url 协议是 http 还是 https【参考方案2】：我认为这是 android studio 的错误。 今天我刚刚将android studio版本从3.5.1更新到3.5.2，问题就消失了。
【讨论】：
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