handler sample with bar

pacehandlersamplerbar

package com.bytefly.handlersample;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends Activity {

	private static final int SUCCESS = 0;
	private static final int FAILURE = 1;
	Activity act;
	boolean isOk = true;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		act = this;
		
		Button.OnClickListener myListener = new Button.OnClickListener() {
			public void onClick(View v) {
				hitTheNetwork();
			}
		};

		Button myButton = (Button) findViewById(R.id.button1);
		myButton.setOnClickListener(myListener);
	}

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

	public void showProgress() {
		ProgressBar pb = (ProgressBar) findViewById(R.id.progressBar1);
		pb.setProgress(0);
		pb.setMax(5);
		pb.setVisibility(View.VISIBLE);
	}

	public void hideProgress() {
		ProgressBar pb = (ProgressBar) findViewById(R.id.progressBar1);
		pb.setVisibility(View.INVISIBLE);
	}

	public void updateProgress(int val) {
		ProgressBar pb = (ProgressBar) findViewById(R.id.progressBar1);
		pb.setProgress(val);
	}

	public void hitTheNetwork() {
		// runs in the main thread
		showProgress();
		Runnable r = new Runnable() {
			public void run() {
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {

				}
				updateProgress(1);
				try {
					Thread.sleep(3000);
				} catch (InterruptedException e) {

				}
				updateProgress(4);
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {

				}
				updateProgress(5);
				Message msg = new Message();			
				if (isOk) {		
					msg.what=SUCCESS;
					myHandler.sendMessage(msg);
					isOk = false;
				} else {
					msg.what=FAILURE;
					msg.obj = "Network failed 400";
					myHandler.sendMessage(msg);
					isOk = true;
				}
			}
		};
		Thread thr = new Thread(r);
		thr.start();
	}
	private Handler myHandler = new Handler() {
		public void handleMessage(Message msg) {
			hideProgress();
			switch (msg.what) {
			case SUCCESS:
				break;
			case FAILURE:
				Toast t = Toast.makeText(act, (String)(msg.obj), Toast.LENGTH_SHORT);
				t.show();
				break;
			}
		}
	};

}