Update UI Using HandlerThread

HanderThread class inherits from the Thread class, which encapsulates the Looper object, so that we do not care The Looper open and release details.

The HandlerThread object can be getLooper method to obtain a Looper object reference.

Methods in HandlerThread:

. getLooper():  This method returns the Looper associated with this thread.

. getThreadId():   Returns the identifier of this thread

. quit():   Ask the currently running looper to quit.

. run():   Calls the run() method of the Runnable object the receiver holds. If no Runnable is set, does nothing.

ProgressBar Example Using HandlerThread :

main.xml:

    
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      <
    

HanderThreadActivity.java :

package com.imrankhanandroid.HanderThread;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;

public class HanderThreadActivity extends Activity {
    /** Called when the activity is first created. */
ProgressBar bar;
Button start;
Runnable progressThread;
MyHandler myHandler;
TextView txtprogress;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.v("HanderThreadActivity :", "Activity Thread :"+Thread.currentThread().getId());
        bar=(ProgressBar)findViewById(R.id.bar);
        txtprogress=(TextView)findViewById(R.id.txtprogress);
        start=(Button)findViewById(R.id.startButton);
      //HandlerThread asynchronous thread, not the main thread public
        HandlerThread handlerThread=new HandlerThread("handler_thread");
      //GetLooper() method before you adjust the start() method 
        handlerThread.start();
        myHandler=new MyHandler(handlerThread.getLooper());
        start.setOnClickListener(new OnClickListener() {
   
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    bar.setVisibility(ProgressBar.VISIBLE);
    myHandler.post(progressThread);
   }
  });
      //Runnable inner class
        progressThread=new Runnable() {
   int percent=0;
   @Override
   public void run() {
    // TODO Auto-generated method stub
    percent +=5;
    Log.v("HanderThreadActivity :", "Runnable  Thread :"+percent+"----"+Thread.currentThread().getId());
    Message msg=new Message();
    //Message object to pass parameters 
    Bundle bundle=new Bundle();
    bundle.putInt("percent", percent);
    msg.setData(bundle);
    myHandler.sendMessage(msg);
    try{
     Thread.sleep(1000);
    }catch (Exception e) {
     // TODO: handle exception
     e.printStackTrace();
    }
   }
  };
 }
 class MyHandler extends Handler{
  public MyHandler(Looper looper){
   super(looper);
  }
  @Override
  public void handleMessage(Message msg){
   Bundle bundle= msg.getData();
   bar.setProgress(bundle.getInt("percent"));
   //MyHandler Thread : 8
   Log.v("HanderThreadActivity :", "MyHandler Thread :"+bundle.getInt("percent")+"---"+Thread.currentThread().getId());
   myHandler.post(progressThread);
   if(bundle.getInt("percent")>=90)
   {
    myHandler.removeCallbacks(progressThread);
   }
  }
 }
}

Download Source Code: HanderThreadExample