How to create/update file with github api v3 from android

TestgithubActivity.java

package com.krama.testgithub;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

import org.eclipse.egit.github.core.Blob;
import org.eclipse.egit.github.core.Commit;
import org.eclipse.egit.github.core.Reference;
import org.eclipse.egit.github.core.Repository;
import org.eclipse.egit.github.core.RepositoryCommit;
import org.eclipse.egit.github.core.Tree;
import org.eclipse.egit.github.core.TreeEntry;
import org.eclipse.egit.github.core.TypedResource;
import org.eclipse.egit.github.core.client.GitHubClient;
import org.eclipse.egit.github.core.service.CommitService;
import org.eclipse.egit.github.core.service.DataService;
import org.eclipse.egit.github.core.service.RepositoryService;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class TestgithubActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            Button button = (Button)findViewById(R.id.buttonUpdateGit);
            button.setOnClickListener(new OnClickListener() {
                
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    updateFile(v);
                }
            });
    };
    
    private void updateFile(View v){
        try {

            // based on http://swanson.github.com/blog/2011/07/23/digging-around-the-github-api-take-2.html
            // initialize github client
            GitHubClient client = new GitHubClient();
            TextView password = (TextView)findViewById(R.id.textViewPassword);
            client.setCredentials("Detelca", password.getText().toString());

            // create needed services
            RepositoryService repositoryService = new RepositoryService();
            CommitService commitService = new CommitService(client);
            DataService dataService = new DataService(client);

            // get some sha's from current state in git
            Repository repository =  repositoryService.getRepository("Detelca", "Detelca");
            String baseCommitSha = repositoryService.getBranches(repository).get(0).getCommit().getSha();
            RepositoryCommit baseCommit = commitService.getCommit(repository, baseCommitSha);
            String treeSha = baseCommit.getSha();

            // create new blob with data
            Blob blob = new Blob();
            blob.setContent("[\"" + System.currentTimeMillis() + "\"]").setEncoding(Blob.ENCODING_UTF8);
            String blob_sha = dataService.createBlob(repository, blob);
            Tree baseTree = dataService.getTree(repository, treeSha);

            // create new tree entry
            TreeEntry treeEntry = new TreeEntry();
            treeEntry.setPath("data/data.json");
            treeEntry.setMode(TreeEntry.MODE_BLOB);
            treeEntry.setType(TreeEntry.TYPE_BLOB);
            treeEntry.setSha(blob_sha);
            treeEntry.setSize(blob.getContent().length());
            Collection<TreeEntry> entries = new ArrayList<TreeEntry>();
            entries.add(treeEntry);
            Tree newTree = dataService.createTree(repository, entries, baseTree.getSha());

            // create commit
            Commit commit = new Commit();
            commit.setMessage("Android commit at " + new Date(System.currentTimeMillis()).toLocaleString());
            commit.setTree(newTree);
            List<Commit> listOfCommits = new ArrayList<Commit>();
            listOfCommits.add(new Commit().setSha(baseCommitSha));
            // listOfCommits.containsAll(base_commit.getParents());
            commit.setParents(listOfCommits);
            // commit.setSha(base_commit.getSha());
            Commit newCommit = dataService.createCommit(repository, commit);

            // create resource
            TypedResource commitResource = new TypedResource();
            commitResource.setSha(newCommit.getSha());
            commitResource.setType(TypedResource.TYPE_COMMIT);
            commitResource.setUrl(newCommit.getUrl());

            // get master reference and update it
            Reference reference = dataService.getReference(repository, "heads/master");
            reference.setObject(commitResource);
            dataService.editReference(repository, reference, true);

            // success
            Toast.makeText(v.getContext(), "Updating github", Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            // error 
            e.printStackTrace();
            Toast.makeText(v.getContext(), "Updating github error " + e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }
}

To make it work you need also jars from
http://code.google.com/p/google-gson/
https://github.com/eclipse/egit-github/tree/master/org.eclipse.egit.github.core

Hi, nice script, should I download GSON, org.eclipse.egot.github.core and Junit(gson dependency) when I am not using maven? Does this code overwrite the file and delete it’s old content or does it add the new information? Thanks for help!