Здравствуйте. Пытаюсь сделать POST запрос на ajax страницу с помощью HttpURLConnection
. Сильно не пинайте, я только сегодня начал практиковать Java и Android. Тестю на API 22 (Intel x86). В обычном хроме та же страница нормально загружается. Logcat:
03-24 10:23:26.842 4679-4679/? I/art: Late-enabling -Xcheck:jni
03-24 10:23:27.402 4679-4679/com.gobonus.gobonus D/AndroidRuntime: Shutting down VM
03-24 10:23:27.427 4679-4679/com.gobonus.gobonus E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.gobonus.gobonus, PID: 4679
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gobonus.gobonus/com.gobonus.gobonus.WelcomeActivity}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5294)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)
at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:110)
at libcore.io.IoBridge.connectErrno(IoBridge.java:137)
at libcore.io.IoBridge.connect(IoBridge.java:122)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:456)
at java.net.Socket.connect(Socket.java:882)
at com.android.okhttp.internal.Platform.connectSocket(Platform.java:174)
at com.android.okhttp.Connection.connect(Connection.java:152)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:276)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:382)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:217)
at com.gobonus.gobonus.Request.<init>(Request.java:65)
at com.gobonus.gobonus.WelcomeActivity.onCreate(WelcomeActivity.java:15)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5294)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) 03-24 10:23:27.498 4679-4690/com.gobonus.gobonus W/art: Suspending all threads took: 26.757ms Request.java:
package com.gobonus.gobonus; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; public class Request { private final String USER_AGENT = "GoBonus Android Client 1.0"; private final String API_SERVER = "http://192.168.2.21"; public String Content; public Request (String session_token, String uri, String params) { String urlParameters = "session_token="+session_token+"&"+params; // url params byte[] postData = new byte[0]; System.setProperty("http.agent", USER_AGENT); // user agent truck // api = android.os.Build.VERSION_CODES.KITKAT) { postData = urlParameters.getBytes( StandardCharsets.UTF_8 ); } else postData = urlParameters.getBytes(Charset.forName("UTF-8")); int postDataLength = postData.length; URL url = null; try { url = new URL( API_SERVER + uri); } catch (MalformedURLException e) { e.printStackTrace(); } HttpURLConnection conn= null; try { conn = (HttpURLConnection) url.openConnection(); } catch (IOException e) { e.printStackTrace(); } conn.setDoOutput( true ); conn.setInstanceFollowRedirects( false ); try { conn.setRequestMethod("POST"); } catch (ProtocolException e) { e.printStackTrace(); } conn.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty( "charset", "utf-8"); conn.setRequestProperty( "Content-Length", Integer.toString( postDataLength )); conn.setUseCaches( false ); try { DataOutputStream wr = new DataOutputStream( conn.getOutputStream()); wr.write( postData ); conn.connect(); Content = ConvertData(conn); } catch (IOException e) { e.printStackTrace(); } } protected String ConvertData (HttpURLConnection url) throws IOException { // local variables String line; StringBuffer text = new StringBuffer(); InputStreamReader in = new InputStreamReader((InputStream) url.getContent()); BufferedReader buff = new BufferedReader(in); do { line = buff.readLine(); text.append(line + "\n"); } while (line != null); return text.toString(); } }
WelcomeActivity.java
package com.gobonus.gobonus; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.TextView; public class WelcomeActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView WebTest = (TextView) findViewById(R.id.webTest); WebTest.setText(new Request("123", "/ajax", "foo=bar").Content); setContentView(R.layout.activity_welcome); } public void LoginGo(View view) { Intent intent = new Intent(WelcomeActivity.this, LoginActivity.class); startActivity(intent); } }
Манифест
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gobonus.gobonus">
<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/GB">
<activity android:name=".WelcomeActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".LoginActivity"
android:label="@string/title_activity_login"
android:parentActivityName=".WelcomeActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.gobonus.gobonus.WelcomeActivity" />
</activity>
</application>
</manifest>
Layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.gobonus.gobonus.WelcomeActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/sign"
android:id="@+id/button"
android:background="#B6B6B6"
android:layout_marginBottom="162dp"
android:onClick="LoginGo"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/button2"
android:layout_alignEnd="@+id/button2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/reg"
android:id="@+id/button2"
android:background="#B6B6B6"
android:layout_alignTop="@+id/button"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="82dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/webTest"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="56dp" />
</RelativeLayout>
Эксепшн NetworkOnMainThreadException
говорит о том, что вы используете сетевые запросы в главном потоке, используйте AsyncTask
для запуска запроса в отдельном от UI потока.
И Метод setContentView
, нужно вызывать до того, как будете обращаться к элементам разметки.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
TextView WebTest = (TextView) findViewById(R.id.webTest);
WebTest.setText(new Request("123", "/ajax", "foo=bar").Content);
}
UPD
Пример запроса через AsyncTask
. Метод doInBackground
выполняется в отдельном от UI
потоке, после того, как вы выполнили запрос и получили ответ, ваши данные упадут в onPostExecute
, который выполняется уже в потоке UI. Не обращайтесь к потоку UI
в doInBackground
, вызовет Exception
.
public class WelcomeActivity extends AppCompatActivity {
TextView WebTest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
WebTest = (TextView) findViewById(R.id.webTest);
new AsyncRequest().execute("123", "/ajax", "foo=bar");
}
class AsyncRequest extends AsyncTask<String, Integer, String>{
@Override
protected String doInBackground(String... arg) {
return new Request(arg[0], arg[1], arg[2]).Content;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
WebTest.setText(s);
}
}
}
Айфон мало держит заряд, разбираемся с проблемой вместе с AppLab
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Если закрыть confirm, то при