Making Changes: Git & Eclipse @DrBFraser

Uploaded May 2013 | Updated September 2026, 2 weeks ago

Normal workflow for making changes using EGit for Eclipse. Shows how to make multiple topic branches, switch branches, commit changes to local repository, and push changes to upstream repository (GitHub).

This video is part of a series of practical tutorials for using the EGit Eclipse plugin for working with a project using the Git revision control system. Demos use GitHub, but any remote repository would work. For more detail on Git, and a guide to using its command line interface, see: git-scm.com/book

For some good tutorials on EGit, see: docs.google.com/folder/d/0B4F_gjXVrHZVRXkydE0xVFBRRkc1WUpEcXdwQ2I1dw/edit?pli=1&docId=0B4F_gjXVrHZVc015aTNiNmhScktlcDJJTGNZd1NlQQ

$Computation in background w/ AsyncTask: Android Programming How to use an AsyncTask to do calculations in the background of an Android Activity: guesses a number on a background thread while showing updates on the UI. Full code below. // TODO: Change all [[ and ]] to less-than and greater-than (YouTube limitation) package ca.demo.asynctaskdemo; import java.util.Random; import android.app.Activity; import android.os.AsyncTask; import android.os.Bundle; import android.view.View; import android.view.Window; import android.widget.TextView; /** * Demonstration of how to use an AsyncTask by cracking a password. */ public class MainActivity extends Activity { private static final long PASSWORD = 12345; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setContentView(R.layout.activity_main); } public void onClick_StartTask(View v) { final long PUBLISH_RATE = 1000; final long RANGE = 1000000; // Start background task PasswordGuesserTask crackerTask = new PasswordGuesserTask(); crackerTask.execute(RANGE, PUBLISH_RATE); } public void displayProgress(String message) { TextView textView = (TextView) findViewById(R.id.txtStatus); textView.setText(message); } public void displayAnswer(long answer) { String message = I know the password: + answer; TextView textView = (TextView) findViewById(R.id.txtFinalAnswer); textView.setText(message); } /* * Background task to crack the password. */ // Generics: // 1. Long: Type of reference(s) passed to doInBackground() // 2. String: Type of reference passed to onProgressUpdate() // 3. Long: Type of reference returned by doInBackground() // Value passed to onPostExecute() // TODO: Change all [[ and ]] to less-than and greater-than (YouTube limitation) private class PasswordGuesserTask extends AsyncTask[[Long, String, Long]] { // Executed on main UI thread @Override protected void onPreExecute() { super.onPreExecute(); MainActivity.this.setProgressBarIndeterminateVisibility(true); } // Run on background thread. @Override protected Long doInBackground(Long... arguments) { // Extract arguments long range = arguments[0]; long publishRate = arguments[1]; long guess = 0; long count = 0; Random rand = new Random(); while (guess != PASSWORD) { guess = Math.abs(rand.nextLong()) % range; count ++; if (count % publishRate 0) { publishProgress( Guess #: + count, Last guess: + guess); } } return guess; } // Executed on main UI thread. @Override protected void onProgressUpdate(String... values) { super.onProgressUpdate(values); String message = ; for (String str : values) { message += str + , ; } displayProgress(message); } // Executed on main UI thread @Override protected void onPostExecute(Long result) { super.onPostExecute(result); displayAnswer(result); MainActivity.this.setProgressBarIndeterminateVisibility(false); } } }$

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$Context (Option) Menu: Android Programming Demonstration on how to create a context menu (options menu) on the Android phone. Contents: - Understanding the context menu. - Adding items to a context menu. - Responding to click events for the menu: launching another activity or changing text in a TextView. - Adding an icon to the context menu. Sample icons I show are from the Annadroid Tehxseven icon pack: http://www.themebowl.com/annadroid-icons-by-tehkseven.html Code: @Override public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); // Dump out the event: String message = Title: + item.getTitle() + , id= + item.getItemId(); Toast.makeText(this, message, Toast.LENGTH_LONG).show(); switch(item.getItemId()) { case R.id.menu_help: startActivity(new Intent(this, HelpActivity.class)); break; case R.id.menu_settings: TextView textView = (TextView) findViewById(R.id.mainText); textView.setText(You changed the text!); } return true; }$

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Brian Fraser |

Making Changes: Git & Eclipse