-2

我试图从服务器获取一些 json 字符串,但是当我想连接到服务器时收到此错误:

10-07 10:57:47.410: E/AndroidRuntime(11050): 致命异常: main 10-07 10:57:47.410: E/AndroidRuntime(11050): java.lang.RuntimeException: 无法启动活动 ComponentInfo{com. example.stampp/com.example.stampp.UI.MainActivity}:android.os.NetworkOnMainThreadException 10-07 10:57:47.410:E/AndroidRuntime(11050):在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970 ) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android .app.ActivityThread.access$600(ActivityThread.java:128) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161) 10-07 10:57:47.410:E/AndroidRuntime(11050):在 android.os.Handler。dispatchMessage(Handler.java:99) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.os.Looper.loop(Looper.java:137) 10-07 10:57:47.410: E/ AndroidRuntime(11050): 在 android.app.ActivityThread.main(ActivityThread.java:4517) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 java.lang.reflect.Method.invokeNative(Native Method) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 java.lang.reflect.Method.invoke(Method.java:511) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993) 10-07 10:57:47.410: E/AndroidRuntime(11050): at com.android.internal.os.ZygoteInit.main(ZygoteInit .java:760) 10-07 10:57:47.410: E/AndroidRuntime(11050): at dalvik.system.NativeStart.main(Native Method) 10-07 10:57:47.410: E/AndroidRuntime(11050): Caused作者:android.os。NetworkOnMainThreadException 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 10-07 10:57:47.410: E/AndroidRuntime(11050):在 libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 libcore.io.IoBridge.connectErrno(IoBridge.java:127) 10-07 10 :57:47.410: E/AndroidRuntime(11050): 在 libcore.io.IoBridge.connect(IoBridge.java:112) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 java.net.PlainSocketImpl。连接(PlainSocketImpl.java:192)10-07 10:57:47.410:E/AndroidRuntime(11050):在 java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)10-07 10:57:47.410:E/ AndroidRuntime(11050):在 java.net.Socket.connect(Socket.java:848) 10-07 10:57:47.410:E/AndroidRuntime(11050):在 org.apache.http。conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119) 10-07 10:57:47.410: E/AndroidRuntime(11050): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144 ) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 10-07 10:57:47.410: E/AndroidRuntime (11050):在 org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 10-07 10:57:47.410:E/AndroidRuntime(11050):在 org.apache.http.impl。 client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 10-07 10:57:47.410: E/AndroidRuntime(11050): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:674) 10 -07 10:57:47.410:E/AndroidRuntime(11050):在 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:511) 10-07 10:57:47.410: E/AndroidRuntime(11050): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient .java:489) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 com.example.stampp.Services.ConfigurateAPI.ConnectApi.postAuthorization(ConnectApi.java:51) 10-07 10:57:47.410 : E/AndroidRuntime(11050): 在 com.example.stampp.UI.MainActivity.onCreate(MainActivity.java:61) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.app.Activity。 performCreate(Activity.java:4470) 10-07 10:57:47.410: E/AndroidRuntime(11050): 在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053) 10-07 10:57:47.410: E/ AndroidRuntime(11050): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934) 10-07 10:57:47.410: E/AndroidRuntime(11050): ... 11 更多

这是我的代码:

public void getAuthorization(String password, String user) {
    String responseString="empty response from api";
    String userPassword = user+":"+password;
    try {
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(_url);

        httpGet.setHeader("Authorization", "Basic "+Base64.encode(userPassword.getBytes(),Base64.NO_WRAP));
        HttpResponse httpResponse = httpClient.execute(httpGet);


        StatusLine statusLine = httpResponse.getStatusLine();
        if(statusLine.getStatusCode() == HttpStatus.SC_OK){
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            httpResponse.getEntity().writeTo(out);
            out.close();
            responseString = out.toString();
        } else{
            //Closes the connection.
            httpResponse.getEntity().getContent().close();
            throw new IOException(statusLine.getReasonPhrase());
        }
    }catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

有人可以帮助我吗?

4

2 回答 2

2

Android 3.0开始,您不能在主线程上使用网络连接。你最好创建一个AsynTaskwithdoInBackground来执行你httpget

于 2013-10-07T08:11:56.730 回答
0

使用一些 AsyncTask 来做到这一点。请参阅基本示例。

于 2013-10-07T08:33:49.217 回答