Question

下午好，

我无法在网络服务器上阅读.txt文件的内容。

以下是我到目前为止的代码，我的清单中有互联网权限。我不确定是什么问题。我已经尝试过关于如何阅读网络上.txt文件内容的大量教程，但到目前为止还没有成功。

代码： songlistURL =＆＃34; http://some.com/website/file.txt＆＃34 ;; URL u = null;

try {
u = new URL(songlistURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.connect();

InputStream in = c.getInputStream();
final ByteArrayOutputStream bo = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
in.read(buffer);
bo.write(buffer);
textFileStr = bo.toString();

   } catch (MalformedURLException e) {
       e.printStackTrace();
   } catch (ProtocolException e) {
       e.printStackTrace();
   } catch (IOException e) {
       e.printStackTrace();
   }

Log.d("text file", "" + textFileStr);

我真的很累，所以我可能只是大脑放屁，但我也没有得到logcat错误输出：

FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.stillbent.staybent/com.stillbent.staybent.Samples}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2136)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2174)
at android.app.ActivityThread.access$700(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1267)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5059)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1131)
at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
at com.stillbent.staybent.Samples.onCreate(Samples.java:61)
at android.app.Activity.performCreate(Activity.java:5058)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
... 11 more

有人能指出我正确的方向吗？

提前致谢，尼克

Answer 1

您收到'NetworkOnMainThreadException'。

你不应该在主线程上做任何阻塞操作 - 这会阻止UI的处理。

您应该将您的网络代码放入AsyncTask。

Android - 从Web上读取TXT文件的内容

1 个答案: