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关于错误android.os.networkonmainthreadexception asynctask getResponseCode和错误的英文的问题就给大家分享到这里，感谢你花时间阅读本站内容，更多关于Android HttpClient：NetworkOnMainThreadException、android – NetworkOnMainThreadException with retrofit-beta2和rxjava、android – RxJava 2 / Retrofit 2 – NetworkOnMainThreadException、android – RxJava和Retrofit2：NetworkOnMainThreadException等相关知识的信息别忘了在本站进行查找喔。
本文目录一览：- 错误android.os.networkonmainthreadexception asynctask getResponseCode（错误的英文）
- Android HttpClient：NetworkOnMainThreadException
- android – NetworkOnMainThreadException with retrofit-beta2和rxjava
- android – RxJava 2 / Retrofit 2 – NetworkOnMainThreadException
- android – RxJava和Retrofit2：NetworkOnMainThreadException
错误android.os.networkonmainthreadexception asynctask getResponseCode（错误的英文）
当我在同一个类上运行我的代码时app运行良好.但是当我在两个不同的类上运行此代码时,我的应用程序是错误
android.os.networkonmainthreadexception.
当debug我在responseHttp = httpconnection.getResponseCode()时检测到错误;
app run to line responseHttp = httpconnection.getResponseCode();然后它去捕捉{},取消“If..else”.并记录错误android.os.networkonmainthreadexception.
你能帮助我吗！！
当debug我在responseHttp = httpconnection.getResponseCode()时检测到错误;
app run to line responseHttp = httpconnection.getResponseCode();然后它去捕捉{},取消“If..else”.并记录错误android.os.networkonmainthreadexception.
你能帮助我吗！！
我的代码类Asynctask
package com.example.finishdemo;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import android.os.AsyncTask;
public class TestConnectionNew extends AsyncTask<String,Void,String> {
private int responseHttp = 0;
private String flag="false";
@Override
protected String doInBackground(String... urltest) {
// Todo Auto-generated method stub
try {
URL url = new URL(urltest[0]);
URLConnection connection = url.openConnection();
connection.setConnectTimeout(2000);
HttpURLConnection httpconnection = (HttpURLConnection) connection;
**responseHttp = httpconnection.getResponseCode();**
if (responseHttp == HttpURLConnection.HTTP_OK) {
flag = "true";
} else {
flag = "false";
}
} catch (Exception e) {
e.printstacktrace();
System.out.println("Thong bao loi: "+e.toString());
}
return flag;
}
}
代码类主要：
package com.example.finishdemo;
public class Hoadon extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.hoadon);
TestConnectionNew t=new TestConnectionNew();
String recieve=t.doInBackground("http://longvansolution.tk/monthlytarget.PHP");
if(recieve.equalsIgnoreCase("true"))
{
doTimerTask();
}else
if(recieve.equalsIgnoreCase("false"))
{
showAlert("Không kết nối được đến server hoặc thiết bị chưa có kết nối internet!");
}
解决方法
使用
asynctask.execute执行AsyncTask而不是手动调用doInBackground：
TestConnectionNew t = new TestConnectionNew();
t.execute("http://longvansolution.tk/monthlytarget.PHP");
将TestConnectionNew更改为
public class TestConnectionNew extends AsyncTask<String,String> {
private int responseHttp = 0;
private String flag="false";
@Override
protected String doInBackground(String... urltest) {
// Todo Auto-generated method stub
try {
URL url = new URL(urltest[0]);
URLConnection connection = url.openConnection();
connection.setConnectTimeout(2000);
HttpURLConnection httpconnection = (HttpURLConnection) connection;
**responseHttp = httpconnection.getResponseCode();**
if (responseHttp == HttpURLConnection.HTTP_OK) {
flag = "true";
} else {
flag = "false";
}
} catch (Exception e) {
e.printstacktrace();
System.out.println("Thong bao loi: "+e.toString());
}
return flag;
}
@Override
protected void onPostExecute(String recieve) {
if(recieve.equalsIgnoreCase("true"))
{
doTimerTask();
}else
if(recieve.equalsIgnoreCase("false"))
{
showAlert("Không kết nối được đến server hoặc thiết bị chưa có kết nối internet!");
}
}
}
有关我们如何使用AsyncTask的更多帮助,请参阅：
http://developer.android.com/reference/android/os/AsyncTask.html
Android HttpClient：NetworkOnMainThreadException
我在下面有一些代码：
protected void testConnection(String url) {
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
ResponseHandler<String> responsehandler = new BasicResponseHandler();
try {
String connection = httpclient.execute(httpget, responsehandler);
Toast.makeText(getBaseContext(), R.string.connection_succeed, Toast.LENGTH_SHORT).show();
view_result.setText(connection);
} catch(IOException e) {
Toast.makeText(getBaseContext(), R.string.connection_Failed, Toast.LENGTH_SHORT).show();
}
httpclient.getConnectionManager().shutdown();
}
并在Menifest中添加权限：
<uses-permission android:name="android.permission.INTERNET"/>
但它是一个例外：
networkonmainthreadException,
我能怎么做？
解决方法:
在ICS及更高版本上,您无法再在UI线程上执行网络操作.相反,你被迫创建一个新的线程并在那里做你的网络.
可能的工具是Android的AsyncTask和普通的Java Thread.
可以在这里找到一个很好的教程：Android Threads, Handlers and AsyncTask – Tutorial
android – NetworkOnMainThreadException with retrofit-beta2和rxjava
我最近从retroft-beta1升级,这是有效的.我有以下API接口：
public interface Service {
@POST("path")
Observable<Object> service();
}
以下电话：
service.service()
.observeOn(AndroidSchedulers.mainThread())
.subscribe();
它会抛出networkonmainthreadException.但这是在改造beta1.
解决方法:
从retrofit-beta2,调用Observable方法now behave synchronously.所以必须使用subscribeOn：
service.service()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe();
android – RxJava 2 / Retrofit 2 – NetworkOnMainThreadException
我需要执行请求,如果我的令牌过期,我需要刷新它并重试请求.
这就是我试图这样做的方式,此刻我可以刷新令牌,但它会抛出一个networkonmainthreadException.它完成了请求,更新令牌并到达日志,但是这个例外它杀了我.我怎么能避免这种情况？
public Observable<Estabelecimento> listarEstabelecimentos() {
return Observable.defer(this::getListarEstabelecimentoObservable)
.retrywhen(throwableObservable -> throwableObservable.flatMap(
throwable -> {
if (throwable instanceof UnauthorizedException) {
return mRequestManager.getTokenObservable(AutoAtendimentoApplication.getContext())
.doOnNext(response -> /* log stuff */)
.flatMap((Function<AuthResponse,ObservableSource<?>>) response2 ->
getListarEstabelecimentoObservable()
.doOnNext(estabelecimento ->
/* log stuff */)
)
);
}
return Observable.error(throwable);
}));
}
NetWorkErrorHandler：
public <T> T processError(Response<T> response ) {
switch (response.code()) {
case 401:
throw new UnauthorizedException();
default:
return response.body();
}
}
令牌：
private Observable<AuthResponse> getToken(Context context,@GrantType.GrantTypeDef String grantType,@Nullable String refreshToken) {
SessionManager sessionManager = SessionManager.getInstance(context);
Usuario usuario = sessionManager.getUser();
AuthRequest request = new AuthRequest(usuario.getUsername(),usuario.getpassword(),grantType,refreshToken);
return mAuthAPIService.getToken(request)
.observeOn(AndroidSchedulers.mainThread())
.subscribeOn(Schedulers.io())
.map(response -> storetokens(response,context));
}
编辑1：我很确定问题发生在flatmap中并且put subscriOn没有解决问题
编辑2：代码更新
解决方法
您的网络正在主线程上运行,您可以通过将observeOn(AndroidSchedulers.mainThread())和subscribeOn(Schedulers.io())添加到您的observable来解决它.
observeOn(…)表示结果在指定的线程上发出 – 在这种情况下是UI线程.
subscribeOn(…)调用基本上是处理请求的地方.如果省略,则在当前线程上完成计算.
android – RxJava和Retrofit2：NetworkOnMainThreadException
我意识到我在MainThread上使用了subscribeOn()/ observeOn().
我可以传递给subscribeOn()的选项有哪些？
我可以传递给observeOn()的选项有哪些？
12-17 21:36:09.154 20550-20550/rx.test D/MainActivity2: [onCreate]
12-17 21:36:09.231 20550-20550/rx.test D/MainActivity2: starting up observable...
12-17 21:36:09.256 20550-20550/rx.test D/MainActivity2: [onError]
12-17 21:36:09.256 20550-20550/rx.test W/System.err: android.os.networkonmainthreadException
GovService.java
import java.util.List;
import retrofit.Call;
import retrofit.http.GET;
import rx.Observable;
public interface GovService {
@GET("/txt2lrn/sat/index_1.json")
Observable<MyTest> getoneTestRx();
}
MyTest.java
public class MyTest {
private String name, url;
private int num;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
@Override
public String toString() {
return "Name: " + this.name + ", num: " + this.num + ", url: " + this.url;
}
}
MainActivity2.java
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.linearlayoutmanager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import retrofit.GsonConverterFactory;
import retrofit.Retrofit;
import retrofit.RxJavaCallAdapterFactory;
import rx.Observable;
import rx.Subscriber;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;
public class MainActivity2 extends AppCompatActivity {
private final String TAG = getClass().getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "[onCreate]");
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
RecyclerView mRV = (RecyclerView) findViewById(R.id.rv);
mRV.setLayoutManager(new linearlayoutmanager(this));// setup LayoutManager
mRV.setItemAnimator(new DefaultItemAnimator());// setup ItemAnimator
// setup retrofit
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://goanuj.freeshell.org")
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build();
GovService service = retrofit.create(GovService.class);
Log.d(TAG, "starting up observable...");
Observable<MyTest> o = service.getoneTestRx();
o.subscribeOn(Schedulers.io());
o.observeOn(AndroidSchedulers.mainThread());
o.subscribe(new Subscriber<MyTest>() {
@Override
public void onCompleted() {
Log.d(TAG, "[onCompleted] ");
}
@Override
public void one rror(Throwable t) {
Log.d(TAG, "[onError] ");
t.printstacktrace();
}
@Override
public void onNext(MyTest m) {
Log.d(TAG, "[onNext] " + m.toString());
}
});
}
}
解决方法:
将代码的最后一部分重写为：
service.getoneTestRx()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<MyTest>() {
@Override
public void onCompleted() {
Log.d(TAG, "[onCompleted] ");
}
@Override
public void one rror(Throwable t) {
Log.d(TAG, "[onError] ");
t.printstacktrace();
}
@Override
public void onNext(MyTest m) {
Log.d(TAG, "[onNext] " + m.toString());
}
});
来自@akarnokd的重要提示：
Worth mentioning that one needs to chain the calls as here because
Observable is not the builder pattern (where you modify the settings
of an existing object)
关于错误android.os.networkonmainthreadexception asynctask getResponseCode和错误的英文的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于Android HttpClient：NetworkOnMainThreadException、android – NetworkOnMainThreadException with retrofit-beta2和rxjava、android – RxJava 2 / Retrofit 2 – NetworkOnMainThreadException、android – RxJava和Retrofit2：NetworkOnMainThreadException的相关信息，请在本站寻找。
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