CODEWITHSUNDEEP
javaandroidandroid-asynctaskandroid-context
user1910290
user1910290

Reputation: 537

checking internet state from asynctask on android

I have two classes; the first is an asynctask and the other is an ConnectionDetector class which contains the code shown here (3rd step),

public class myTask extends AsyncTask<String,Void,String>{


private Context context;

ConnectionDetector connectiondetector = new ConnectionDetector(context);


@Override
protected void onPreExecute() {
    // TODO Auto-generated method stub
    super.onPreExecute();

    //CHECK INTERNET CONNECTION 
if(connectiondetector.isConnectingToInternet()){ //method from connectiondetector.java

            //do something 
    }
}

when I run this code I get a null pointer exception at the if statement. is it because of the context, how do I fix this?

the asynctask class is called from a different activity ( partosrecord.class )

Upvotes: 0

Views: 461

Answers (2)

duggu
duggu

Reputation: 38439

Code where u call asynctask:-

myTask site = new myTask(this);
site.execute();

or use this below code on AsyncTask

public class myTask extends AsyncTask<String,Void,String>{


private Context context;
ConnectionDetector connectiondetector
public myTask(Context con)
{
     context=con;
     connectiondetector = new ConnectionDetector(context);
}

@Override
protected void onPreExecute() {
    // TODO Auto-generated method stub
    super.onPreExecute();

    //CHECK INTERNET CONNECTION 
if(connectiondetector.isConnectingToInternet()){ //method from connectiondetector.java

            //do something }
}

Upvotes: 0

Raghunandan
Raghunandan

Reputation: 133560

Pass context to the constructor of oyur asynctask from your activity class

   new myTask(ActivityName.this).execute(params);

In your asynctask

    public class myTask extends AsyncTask<String,Void,String>{
       ConnectionDetector connectiondetector
       Context mcontext;
       public myTask(Context context)
         {
            mcontext= context;
            connectiondetector = new ConnectionDetector(mcontext);
         }

       @Override
     protected void onPreExecute() {

        super.onPreExecute();
        if(connectiondetector.isConnectingToInternet()){
          //dosomething  
         } 
     }

Upvotes: 1

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