Revenir à une activité précédente contenant un BaseAdapter

Bonjour à tous,

Je détiens actuellement deux activités effectuant des requêtes HTTP.

La première activité contient une classe CustomList extends BaseAdapter.

Sur la seconde, il y a un bouton précédent me permettant de revenir à la première activité.

En revenant sur la première activité, j'aimerai pouvoir récupérer l'état dans lequel je l'ai laissé. C'est à dire pouvoir retrouver les informations qui eux aussi proviennent d'une requête HTTP. J'aimerai retrouvé la donnée "infos_user" qui est dans la première activité et les données dans le BaseAdapter.

Mon architecture est donc la suivante : Activité 0 (HTTP requête) -> Activité 1 (avec BaseAdapter et HTTP requête) -> Activité 2 (HTTP requête)


Première activité:

public class GetChildrenList extends AppCompatActivity implements View.OnClickListener {
    private ArrayList<Child> childrenImeList = new ArrayList<Child>();

    private Button btn_previous;
    private ListView itemsListView;
    private TextView tv_signin_success;

    int id = 0;
    String infos_user;
    String email;
    String password;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.get_children_list);

        infos_user = (String) getIntent().getSerializableExtra("infos_user");

        Intent intent = new Intent(GetChildrenList.this , GetLearningGoalsList.class);
        intent.putExtra("username", infos_user);

        btn_previous = (Button) findViewById(R.id.btn_previous);

        btn_previous.setOnClickListener(this);

        tv_signin_success = (TextView) findViewById(R.id.tv_signin_success);


        tv_signin_success.setText("Bonjour " + infos_user + "!");

        itemsListView  = (ListView)findViewById(R.id.list_view_children);


        new GetChildrenAsync().execute();
    }


    @Override
    public void onClick(View v) {
        Intent myIntent = new Intent(GetChildrenList.this, MainActivity.class);
        myIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(myIntent);
        finish();
        return;
    }

    class GetChildrenAsync extends AsyncTask<String, Void, ArrayList<Child>>  {

        private Dialog loadingDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            loadingDialog = ProgressDialog.show(GetChildrenList.this, "Please wait", "Loading...");
        }

        @Override
        protected ArrayList<Child> doInBackground(String... params) {


            int age = 0;
            email = (String) getIntent().getSerializableExtra("email");
            password = (String) getIntent().getSerializableExtra("password");
            String first_name = null;
            String last_name = null;

            try {

                SendRequest sr = new SendRequest();
                String result = sr.sendHttpRequest("http://" + sr.getIP_ADDRESS() + "/childrenime/list", "GET", true, email, password);

                String jsonResult = "{ \"children\":" + result + "}";

                Log.d("result1", jsonResult);

                //Manage JSON result
                JSONObject jsonObject = new JSONObject(jsonResult);
                JSONArray childrenArray = jsonObject.getJSONArray("children");

                for (int i = 0; i < childrenArray.length(); ++i) {
                    JSONObject child = childrenArray.getJSONObject(i);
                    id = child.getInt("id");
                    first_name = child.getString("first_name");
                    last_name = child.getString("last_name");
                    age = child.getInt("age");

                    String name = first_name + " " + last_name;

                    childrenImeList.add(new Child(id,name,age));
                }

            } catch (JSONException e) {
                e.printStackTrace();
            }

            return childrenImeList;

        }

        @Override
        protected void onPostExecute(final ArrayList<Child> childrenListInformation) {
            loadingDialog.dismiss();
            if(childrenListInformation.size() > 0) {
                CustomListChildrenAdapter adapter = new CustomListChildrenAdapter(GetChildrenList.this, childrenListInformation);
                itemsListView.setAdapter(adapter);
            }
            else{
                Toast.makeText(getApplicationContext(), "Impossible de récupérer la liste des enfants", Toast.LENGTH_LONG).show();
            }
        }
    }
}

BaseAdapter:

public class CustomListChildrenAdapter extends BaseAdapter implements View.OnClickListener {
    private Context context;
    private ArrayList<Child> children;
    private Button btnChoose;
    private TextView childrenName;
    private TextView childrenAge;

    public CustomListChildrenAdapter(Context context, ArrayList<Child> children) {
        this.context = context;
        this.children = children;
    }

    @Override
    public int getCount() {
        return children.size(); //returns total item in the list
    }

    @Override
    public Object getItem(int position) {
        return children.get(position); //returns the item at the specified position
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View view;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.layout_list_view_children,null);
            childrenName = (TextView)view.findViewById(R.id.tv_childrenName);
            childrenAge = (TextView) view.findViewById(R.id.tv_childrenAge);
            btnChoose = (Button) view.findViewById(R.id.btn_choose);
            btnChoose.setOnClickListener(this);

        } else {
            view = convertView;
        }

        btnChoose.setTag(position);

        Child currentItem = (Child) getItem(position);
        childrenName.setText(currentItem.getChildName());
        childrenAge.setText(currentItem.getChildAge() + "");

        return view;
    }

    @Override
    public void onClick(View v) {
        Integer position = (Integer) v.getTag();
        Child item = (Child) getItem(position);
        String email = (String) ((Activity) context).getIntent().getSerializableExtra("email");
        String password = (String) ((Activity) context).getIntent().getSerializableExtra("password");

        Intent intent = new Intent(context, GetLearningGoalsList.class);
        intent.putExtra("idChild",item.getId());
        intent.putExtra("email",email);
        intent.putExtra("password",password);

        context.startActivity(intent);

    }
}

Deuxième activité:

public class GetLearningGoalsList extends AppCompatActivity implements View.OnClickListener {
    private ArrayList<LearningGoal> childrenLearningList = new ArrayList<LearningGoal>();

    private Button btn_previous;
    private ListView itemsListView;

    String email;
    String password;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.get_learning_goals_list);

        btn_previous = (Button) findViewById(R.id.btn_previous);

        btn_previous.setOnClickListener(this);

        itemsListView  = (ListView)findViewById(R.id.list_view_learning_goals);


        new GetLearningGoalsAsync().execute();
    }

    @Override
    public void onClick(View v) {
        Intent myIntent = new Intent(GetLearningGoalsList.this, GetChildrenList.class);
        myIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(myIntent);
        return;
    }

    class GetLearningGoalsAsync extends AsyncTask<String, Void, ArrayList<LearningGoal>>  {

        private Dialog loadingDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            loadingDialog = ProgressDialog.show(GetLearningGoalsList.this, "Please wait", "Loading...");
        }

        @Override
        protected ArrayList<LearningGoal> doInBackground(String... params) {

            int id = 0;
            email = (String) getIntent().getSerializableExtra("email");
            password = (String) getIntent().getSerializableExtra("password");
            int idChild = (int) getIntent().getSerializableExtra("idChild");
            String name = null;
            String start_date = null;
            String end_date = null;

            try {

                List<BasicNameValuePair> parameters = new LinkedList<BasicNameValuePair>();
                parameters.add(new BasicNameValuePair("idchild", Integer.toString(idChild)));

                SendRequest sr = new SendRequest();
                String result = sr.sendHttpRequest("http://" + sr.getIP_ADDRESS() + "/learningchild/list"+ "?"+ URLEncodedUtils.format(parameters, "utf-8"), "POST", true, email, password);

                String jsonResult = "{ \"learningGoals\":" + result + "}";

                Log.d("result1", jsonResult);


                //Manage JSON result
                JSONObject jsonObject = new JSONObject(jsonResult);
                JSONArray learningGoalsArray = jsonObject.getJSONArray("learningGoals");

                for (int i = 0; i < learningGoalsArray.length(); ++i) {
                    JSONObject learningGoal = learningGoalsArray.getJSONObject(i);
                    id = learningGoal.getInt("id");
                    name = learningGoal.getString("name");
                    start_date = learningGoal.getString("start_date");
                    end_date = learningGoal.getString("end_date");


                    childrenLearningList.add(new LearningGoal(id,name,start_date,end_date));
                }

            } catch (JSONException e) {
                e.printStackTrace();
            }

            return childrenLearningList;

        }

        @Override
        protected void onPostExecute(final ArrayList<LearningGoal> learningListInformation) {
            loadingDialog.dismiss();
            if(learningListInformation.size() > 0) {
                CustomListLearningGoalAdapter adapter = new CustomListLearningGoalAdapter(GetLearningGoalsList.this, learningListInformation);
                itemsListView.setAdapter(adapter);
            }
            else{
                Toast.makeText(getApplicationContext(), "Impossible de récupérer la liste des scénarios de cet enfant", Toast.LENGTH_LONG).show();
            }
        }
    }
}

Merci à vous.