This question already has answers here:
How to fix 'android.os.NetworkOnMainThreadException'?
                                
                                    (56个答案)
                                
                        
                                5年前关闭。
            
                    
我正在尝试使用Parse.com lib开发我的应用程序。
当用户登录其帐户时,他将进入“主要”活动。他第一次这样做,没关系。但是,如果他先注销然后再次登录,则当他进入主要活动时将显示错误。

我正在使用一个滑动菜单,如果用户已登录,它将显示以下选项:设置和注销。或者,显示“登录并注册”。

也许错误是当我设置这些视图的可见性时。
这是logCat。

04-17 17:28:03.155: E/AndroidRuntime(14343): FATAL EXCEPTION: main
04-17 17:28:03.155: E/AndroidRuntime(14343): java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.fitness.legacy.personal/br.com.activities.fitness.legacy.TelaPrincipalLogado}: android.os.NetworkOnMainThreadException
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1968)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread.access$600(ActivityThread.java:127)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.os.Handler.dispatchMessage(Handler.java:99)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.os.Looper.loop(Looper.java:137)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread.main(ActivityThread.java:4507)
04-17 17:28:03.155: E/AndroidRuntime(14343): at java.lang.reflect.Method.invokeNative(Native Method)
04-17 17:28:03.155: E/AndroidRuntime(14343): at java.lang.reflect.Method.invoke(Method.java:511)
04-17 17:28:03.155: E/AndroidRuntime(14343): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
04-17 17:28:03.155: E/AndroidRuntime(14343): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
04-17 17:28:03.155: E/AndroidRuntime(14343): at dalvik.system.NativeStart.main(Native Method)
04-17 17:28:03.155: E/AndroidRuntime(14343): Caused by: android.os.NetworkOnMainThreadException
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.close(OpenSSLSocketImpl.java:922)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.SocketHttpClientConnection.close(SocketHttpClientConnection.java:205)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.conn.DefaultClientConnection.close(DefaultClientConnection.java:161)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.conn.tsccm.AbstractConnPool.closeConnection(AbstractConnPool.java:320)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.conn.tsccm.AbstractConnPool.shutdown(AbstractConnPool.java:296)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.conn.tsccm.ConnPoolByRoute.shutdown(ConnPoolByRoute.java:670)
04-17 17:28:03.155: E/AndroidRuntime(14343): at org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.shutdown(ThreadSafeClientConnManager.java:257)
04-17 17:28:03.155: E/AndroidRuntime(14343): at com.parse.ParseRequest.initialize(ParseRequest.java:106)
04-17 17:28:03.155: E/AndroidRuntime(14343): at com.parse.Parse.initialize(Parse.java:108)
04-17 17:28:03.155: E/AndroidRuntime(14343): at br.com.activities.fitness.legacy.TelaPrincipalLogado.onCreate(TelaPrincipalLogado.java:65)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.Activity.performCreate(Activity.java:4465)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
04-17 17:28:03.155: E/AndroidRuntime(14343): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)
04-17 17:28:03.155: E/AndroidRuntime(14343): ... 11 more


对不起,我的英语不好 :/

更新:

我意识到我已经在使用线程进行登录,注销和注册。因为lib为我提供了以下方法:

ParseUser.logInInBackground(usuario, senha, new LogInCallback() {
              public void done(ParseUser user, ParseException e) {
                if (user != null) {
                    Intent it = new Intent(getApplicationContext(), TelaPrincipal.class);
                    finish();
                    startActivity(it);
                } else {
                    Log.e("Erro no login", e.getMessage());
                    Toast.makeText(getBaseContext(), getString(R.string.tente_novamente), Toast.LENGTH_LONG).show();
                }


              }
            });


注册方式

ParseUser user = new ParseUser();
            user.setUsername(usuario);
            user.setPassword(senha);
            user.setEmail(email);

            user.signUpInBackground(new SignUpCallback() {
                  public void done(ParseException e) {
                    if (e == null) {
                            startActivity(new Intent(getApplicationContext(), TelaPrincipal.class));
                    } else {
                        Log.e("Erro no Cadastro", e.getMessage());
                        textViewErro.setText(getString(R.string.tente_novamente));
                        textViewErro.setVisibility(View.VISIBLE);
                    }
                  }
                });


因此,如果lib对我执行这些操作,则会引发线程。我需要做什么?用户首次登录或注册时,一切运行正常。但是,如果他注销并再次登录,则会显示异常。我不知道该做什么; /

最佳答案

它是由android.os.NetworkOnMainThreadException引起的。您无法在android中的主UI线程上执行任何网络操作。您需要在后台线程上执行任何网络操作。最简单的方法是AsyncTask。您应该阅读有关线程here的文档。

08-05 02:59
查看更多