Попытка отправить запросы JSON, получить java.lang.IllegalStateException: целевой хост не должен быть нулевым или задан в параметрах

Question

Я получаю эту ошибку, когда пытаюсь нажать кнопку.

11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ java.lang.IllegalStateException: Target host must not be null, or set in parameters. scheme=null, host=null, path=172.27.123.71 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:591) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:293) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at applicatoin.MainActivity$1.onClick(MainActivity.java:79) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.view.View.performClick(View.java:4438) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.view.View$PerformClick.run(View.java:18422) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:733) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.os.Looper.loop(Looper.java:136) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5017) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:515) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
11-05 22:12:30.797 31048-31048/applicatoin W/System.err﹕ at dalvik.system.NativeStart.main(Native Method) 

Я пытаюсь отправить запрос на отправку JSON на сервер. Вот мой код:

package applicatoin; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Button; 
import android.widget.EditText; 
import android.view.View; 
import android.view.View.OnClickListener; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.StringEntity; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.protocol.BasicHttpContext; 
import org.apache.http.protocol.HttpContext; 
import org.apache.http.util.EntityUtils; 


public class MainActivity extends Activity { 


    Button sendIPbutton; //Button for sending IP Address 
    EditText mEdit; //Get info from what user enters in form 
    //TextView mText; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     /*get reference to views*/ 
     sendIPbutton = (Button) findViewById(R.id.sendIP); 
     mEdit = (EditText) findViewById(R.id.enterIP); 

     /*add click listener to Button "sendIPbutton"*/ 
     sendIPbutton.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 
       //Add JSON Logic here 

       String ip = (mEdit).getText().toString(); 
       String json = "{\"lights\": [{\"lightId\": 1, \"red\":242,\"green\":116,\"blue\":12, \"intensity\": 0.5}],\"propagate\": true}"; 


       HttpClient httpClient = new DefaultHttpClient(); 
       HttpContext httpContext = new BasicHttpContext(); 
       HttpPost httpPost = new HttpPost(ip); 

       try { 

        StringEntity se = new StringEntity(json); 
        httpPost.setEntity(se); 
        httpPost.setHeader("Accept", "ms3/json"); 
        httpPost.setHeader("Content-type", "ms3/json"); 

        HttpResponse response = httpClient.execute(httpPost, httpContext); 
        HttpEntity entity = response.getEntity(); 

        String jsonString = EntityUtils.toString(entity); 


       } catch (Exception e){ 
        e.printStackTrace(); 
       } 


       mEdit = (EditText)findViewById(R.id.enterIP); //get text from form? 
      } 
     }); 
     // addListenerOnButton(); //Added for button to Send IP Address 
    } 

    public void sendJSONTest(View view){ 
     switch (view.getId()){ 
      case R.id.sendIP: 
       String ip = (mEdit).getText().toString(); 
       String json = "{\"lights\": [{\"lightId\": 1, \"red\":242,\"green\":116,\"blue\":12, \"intensity\": 0.5}],\"propagate\": true}"; 


       HttpClient httpClient = new DefaultHttpClient(); 
       HttpContext httpContext = new BasicHttpContext(); 
       HttpPost httpPost = new HttpPost(ip); 

       try { 

        StringEntity se = new StringEntity(json); 
        httpPost.setEntity(se); 
        httpPost.setHeader("Accept", "ms3/json"); 
        httpPost.setHeader("Content-type", "ms3/json"); 

        HttpResponse response = httpClient.execute(httpPost, httpContext); 
        HttpEntity entity = response.getEntity(); 

        String jsonString = EntityUtils.toString(entity); 


       } catch (Exception e){ 
        e.printStackTrace(); 
       } 

       break; 

     } 
    } 
    public void sendJSONTest(String ip) { 
     String json = "{\"lights\": [{\"lightId\": 1, \"red\":242,\"green\":116,\"blue\":12, \"intensity\": 0.5}],\"propagate\": true}"; 


     HttpClient httpClient = new DefaultHttpClient(); 
     HttpContext httpContext = new BasicHttpContext(); 
     HttpPost httpPost = new HttpPost(ip); 

     try { 

      StringEntity se = new StringEntity(json); 
      httpPost.setEntity(se); 
      httpPost.setHeader("Accept", "ms3/json"); 
      httpPost.setHeader("Content-type", "ms3/json"); 

      HttpResponse response = httpClient.execute(httpPost, httpContext); 
      HttpEntity entity = response.getEntity(); 

      String jsonString = EntityUtils.toString(entity); 


     } catch (Exception e){ 
      e.printStackTrace(); 
     } 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

Я не уверен, что причина ошибки. Кнопка идентифицирует текст в текстовом поле, но когда мы пытаемся выполнить HTTPrequest, мы получаем системную ошибку. JSON находится в правильном формате. Сервер даже не получает запрос.

Answer 1

Use Seprate classes For sending all json request i will show one single demo 



package applicatoin; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Button; 
import android.widget.EditText; 
import android.view.View; 
import android.view.View.OnClickListener; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.StringEntity; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.protocol.BasicHttpContext; 
import org.apache.http.protocol.HttpContext; 
import org.apache.http.util.EntityUtils; 


public class MainActivity extends Activity { 


    Button sendIPbutton; //Button for sending IP Address 
    EditText mEdit; //Get info from what user enters in form 
    //TextView mText; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     /*get reference to views*/ 
     sendIPbutton = (Button) findViewById(R.id.sendIP); 
     mEdit = (EditText) findViewById(R.id.enterIP); 

     /*add click listener to Button "sendIPbutton"*/ 
     sendIPbutton.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 
       //Add JSON Logic here 
new SendRequest().execute(); 



       mEdit = (EditText)findViewById(R.id.enterIP); //get text from form? 
      } 
     }); 
     // addListenerOnButton(); //Added for button to Send IP Address 
    } 

} 

Class SendRequest extends AsyncTask<Void, Void, Void> 
{ 
@Override 
    protected Void doInBackground(Void... params) { 

String ip = (mEdit).getText().toString(); 
       String json = "{\"lights\": [{\"lightId\": 1, \"red\":242,\"green\":116,\"blue\":12, \"intensity\": 0.5}],\"propagate\": true}"; 


       HttpClient httpClient = new DefaultHttpClient(); 
       HttpContext httpContext = new BasicHttpContext(); 
       HttpPost httpPost = new HttpPost(ip); 

       try { 

        StringEntity se = new StringEntity(json); 
        httpPost.setEntity(se); 
        httpPost.setHeader("Accept", "ms3/json"); 
        httpPost.setHeader("Content-type", "ms3/json"); 

        HttpResponse response = httpClient.execute(httpPost, httpContext); 
        HttpEntity entity = response.getEntity(); 

        String jsonString = EntityUtils.toString(entity); 


       } catch (Exception e){ 
        e.printStackTrace(); 
       } 

} 

}