DeferWorkHandler.java

package com.google.mcommerce.sample.android.chapter06.handler;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

public class DeferWorkHandler extends Handler {
	public static final String tag = "TestHandler1";
	private int count = 0;
	private TestHandlersDriverActivity parentActivity = null;

	public DeferWorkHandler(TestHandlersDriverActivity inParentActivity) {
		parentActivity = inParentActivity;
	}

	@Override
	public void handleMessage(Message msg) {
		String pm = new String("message called:" + count + ":"
				+ msg.getData().getString("message"));

		Log.d(tag, pm);
		this.printMessage(pm);

		if (count > 5) {
			return;
		}
		count++;
		sendTestMessage(1);
	}

	public void sendTestMessage(long interval) {
		Message m = this.obtainMessage();
		prepareMessage(m);
		this.sendMessageDelayed(m, interval * 1000);
	}

	public void doDeferredWork() {
		count = 0;
		sendTestMessage(1);
	}

	public void prepareMessage(Message m) {
		Bundle b = new Bundle();
		b.putString("message", "Hello World");
		m.setData(b);
		return;
	}

	private void printMessage(String xyz) {
		parentActivity.appendText(xyz);
	}
}