很難找到在logcat中顯示的錯誤類型

01-30 23:59:02.322: E/AndroidRuntime(1105): FATAL EXCEPTION: main 
01-30 23:59:02.322: E/AndroidRuntime(1105): Process: com.example.radio, PID: 1105 
01-30 23:59:02.322: E/AndroidRuntime(1105): android.os.NetworkOnMainThreadException 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.example.radio.JSONParser.makeHttpRequest(JSONParser.java:38) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.example.radio.Answers$GetAnswers$1.run(Answers.java:98) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at android.os.Handler.handleCallback(Handler.java:733) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at android.os.Handler.dispatchMessage(Handler.java:95) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at android.os.Looper.loop(Looper.java:136) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at dalvik.system.NativeStart.main(Native Method)

這些是在LogCat中顯示的各種類型的錯誤，當我運行我的android應用程序項目時。請幫助我找到那些類型的錯誤。很難找到在logcat中顯示的錯誤類型

這裏是我的MainActivity值編碼.....

package com.example.radio; 

import java.util.ArrayList; 
import java.util.List; 
import org.apache.http.NameValuePair; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONException; 
import org.json.JSONObject; 
import android.app.ActionBar.Tab; 
import android.app.Activity; 
import android.app.FragmentTransaction; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.EditText; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.Toast; 
import android.app.ActionBar; 
public class MainActivity extends Activity 
{ 
private ProgressDialog pDialog; 
JSONParser jParser=new JSONParser(); 
RadioGroup R1,R2; 
RadioButton B1,B2; 
Button submit; 
    CheckBox C1,C2,C3; 
EditText email; 
String s1=""; 
private static final String TAG_SUCCESS = "success"; 
private static String url_http="http://saravananoct14.web44.net/add.php"; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
R1=(RadioGroup)findViewById(R.id.group1); 
R2=(RadioGroup)findViewById(R.id.group2); 
C1=(CheckBox)findViewById(R.id.checkBox1); 
C2=(CheckBox)findViewById(R.id.checkBox2); 
C3=(CheckBox)findViewById(R.id.checkBox3); 
email=(EditText)findViewById(R.id.email); 

submit=(Button)findViewById(R.id.back); 
submit.setOnClickListener(new OnClickListener() 
{ 

    @Override 
    public void onClick(View v) { 
    // TODO Auto-generated method stub 
    String simple=""; 
B1=(RadioButton)findViewById(R1.getCheckedRadioButtonId()); 
    B2=(RadioButton)findViewById(R2.getCheckedRadioButtonId());  

if(C1.isChecked()) 
{ 
    s1=s1.concat(C1.getText().toString()); 

} 
    if(C2.isChecked()) 
{ 
    s1=s1.concat(","); 
    s1=s1.concat(C2.getText().toString()); 

} 
if(C3.isChecked()) 
{ 
    s1=s1.concat(","); 
    s1=s1.concat(C3.getText().toString()); 

} 
                         simple=B1.getText().toString()+","+B2.getText().toString()+","+s1+","+email.getText().toString(); 
Toast.makeText(MainActivity.this, simple, Toast.LENGTH_LONG).show(); 
new addanswers().execute(); 
} 


}); 
} 
class addanswers extends AsyncTask<String,String,String> 
{ 
    protected void onPreExecute() 
{ 
     super.onPreExecute(); 
      pDialog = new ProgressDialog(MainActivity.this); 
      pDialog.setMessage("Adding answers to the database"); 
      pDialog.setIndeterminate(false); 
      pDialog.setCancelable(true); 
      pDialog.show(); 

} 

    protected String doInBackground(String... args) 
{ 
     // TODO Auto-generated method stub 
     String EMAIL_ID=email.getText().toString(); 
     String Q1=B1.getText().toString(); 
     String Q2=B2.getText().toString(); 
     String Q3=s1; 
List<NameValuePair> params = new ArrayList<NameValuePair>(); 
params.add(new BasicNameValuePair("EMAIL_ID",EMAIL_ID)); 
params.add(new BasicNameValuePair("Q1",Q1)); 
params.add(new BasicNameValuePair("Q2",Q2)); 
params.add(new BasicNameValuePair("Q3",Q3)); 

JSONObject json=jParser.makeHttpRequest(url_http,"POST",params);   
Log.d("Create Response",json.toString()); 
try { 
    int success = json.getInt(TAG_SUCCESS); 

    if (success == 1) { 
Intent intent=new Intent(getApplicationContext(),Res.class); 
startActivity(intent); 

     finish(); 

    } else { 
     } 
} catch (JSONException e) { 
    e.printStackTrace(); 
} 


return null; 
    } 
    protected void onPostExecute(String file_url) { 
    try{  pDialog.cancel(); 
    }catch (Exception e){ 
     e.printStackTrace(); 

    } 
    } 

    } 

public void onDestroy(){ 
    super.onDestroy(); 
    if(pDialog!=null && pDialog.isShowing()) 
    { 
     pDialog.cancel(); 
    }  

} 


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

    Intent intent=new Intent(getApplicationContext(),Admin.class); 
    startActivity(intent); 

    return true; 
} 


    }

所以我應該在這個改變？任何核心？請建議我....

來源

2014-01-31 user3252890

'android.os.NetworkOnMainThreadException'運行在ui線程上進行網絡操作。使用'Asynctask'或'Thread'。 – Raghunandan

http://stackoverflow.com/questions/6343166/android-os-networkonmainthreadexception –

基於網絡的操作不應該在主線程上運行。

嘗試使用線程

new Thread(new Runnable(){ 
    @Override 
    public void run() { 
     try { 
      //your code 
     } catch (Exception ex) { 
      ex.printStackTrace(); 
     } 
    } 
}).start();

或使用AsyncTask

來源

2014-01-31 05:21:52

基於網絡的操作_should_不能在主線程上運行 – krammer

@ krammer..corrected ..：P –

我覺得你的主要錯誤在於以下幾行：

01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.example.radio.JSONParser.makeHttpRequest(JSONParser.java:38) 
01-30 23:59:02.322: E/AndroidRuntime(1105):  at com.example.radio.Answers$GetAnswers$1.run(Answers.java:98)

退房類Answers.java (line no : 98)和JSONParser.java (line no : 38)

你的主要錯誤是NetworkOnMainThreadException通常，當應用程序嘗試在其主線程上執行聯網操作時，會引發此異常。在AsyncTask

class RetreiveFeedTask extends AsyncTask<String, Void, RSSFeed> { 

    private Exception exception; 

    protected RSSFeed doInBackground(String... urls) { 
     try { 
      URL url= new URL(urls[0]); 
      SAXParserFactory factory =SAXParserFactory.newInstance(); 
      SAXParser parser=factory.newSAXParser(); 
      XMLReader xmlreader=parser.getXMLReader(); 
      RssHandler theRSSHandler=new RssHandler(); 
      xmlreader.setContentHandler(theRSSHandler); 
      InputSource is=new InputSource(url.openStream()); 
      xmlreader.parse(is); 
      return theRSSHandler.getFeed(); 
     } catch (Exception e) { 
      this.exception = e; 
      return null; 
     } 
    } 

    protected void onPostExecute(RSSFeed feed) { 
     // TODO: check this.exception 
     // TODO: do something with the feed 
    } 
}

運行您的代碼如何執行任務：

new RetreiveFeedTask().execute(urlToRssFeed);

不要忘了將它添加到AndroidManifest.xml文件：

<uses-permission android:name="android.permission.INTERNET"/>

來源

2014-01-31 05:24:21

很難找到在logcat中顯示的錯誤類型

回答

相關問題