MyLongTask.java

package com.pinecone.technology.mcommerce.learning.android.chapter06.asyncTask;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;

public class MyLongTask extends AsyncTask<String, Integer, Integer> {
	IReportBack r;
	Context ctx;
	public String tag = null;
	ProgressDialog pd = null;

	MyLongTask(IReportBack inr, Context inCtx, String inTag) {
		r = inr;
		ctx = inCtx;
		tag = inTag;
	}

	protected void onPreExecute() {
		// Runs on the main ui thread
		Utils.logThreadSignature(this.tag);
		pd = ProgressDialog.show(ctx, "title", "In Progress...", true);
	}

	protected void onProgressUpdate(Integer... progress) {
		// Runs on the main ui thread
		Utils.logThreadSignature(this.tag);
		this.reportThreadSignature();

		// will be called multiple times
		// triggered by onPostExecute
		Integer i = progress[0];
		r.reportBack(tag, "Progress:" + i.toString());
	}

	protected void onPostExecute(Integer result) {
		// Runs on the main ui thread
		Utils.logThreadSignature(this.tag);
		r.reportBack(tag, "onPostExecute result:" + result);
		pd.cancel();
	}

	protected Integer doInBackground(String... strings) {
		// Runs on a worker thread
		// May even be a pool if there are
		// more tasks.
		Utils.logThreadSignature(this.tag);

		for (String s : strings) {
			Log.d(tag, "Processing:" + s);
			// r.reportTransient(tag, "Processing:" + s);
		}
		for (int i = 0; i < 3; i++) {
			Utils.sleepForInSecs(2);
			publishProgress(i);
		}
		return 1;
	}

	protected void reportThreadSignature() {
		String s = Utils.getThreadSignature();
		r.reportBack(tag, s);
	}
}