java - Passing context from class extends thread -

before, using kelas1 extends service, , code worked read inbox. don't know how work if class using kelas1 extends thread.

sms.inbox(kelas1.this,localdataoutputstream); 

and code:

kelas1.java

public class kelas1 extends thread { public void run() {     //code     while (true) {          charsread = in.read(buffer);         if (charsread != 1) {             string message = new string(buffer).substring(0, charsread).replace(system.getproperty("line.separator"),"");             log.d("wew", message);                  // problem             sms.inbox(kelas1.this,localdataoutputstream);     }  } 

readsms.java

public class readsms {      public void inbox(context context, dataoutputstream outstr) throws ioexception{         uri urismsuri = uri.parse("content://sms/inbox");            cursor cur = context.getcontentresolver().query(urismsuri, null, null, null,null);           string sms = "";           int body = cur.getcolumnindex("body");           while (cur.movetonext()) {               sms += "dari :" + cur.getstring(2) + " : " + cur.getstring(body);                    }           log.d("wew", sms);           sms = sms + "\nbaca sms selesai";           outstr.writebytes(sms);     } } 

you need context of activity class, need 1 constructor in kelas1

context context;  public kelas1(context context) {    this.context = context; } 

then in code must use context like:

     sms.inbox(context,localdataoutputstream); 

change code top like:

final context context; public class kelas1 extends activity {     public kelas1(context context)     {        this.context = context;        call_thread();        }  public void call_thread(){         new thread(new runnable(){          public void run() {             while (true) {                 charsread = in.read(buffer);                 if (charsread != 1) {                     string message = new string(buffer).substring(0, charsread).replace(system.getproperty("line.separator"),"");                     log.d("wew", message);                      // problem                         sms.inbox(this.context,localdataoutputstream);                 }               }            }).start();          }     }