MyTask_02 - TaskActivity.java

package com.example.admin.mytask;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class TaskActivity extends AppCompatActivity {
    private String currentUser;
    private Context context;
    UtlUserSP userUtil = new UtlUserSP();
    TaskAdapter myAdapter;
    public static boolean changesMade = false;

    TextView taskUser;
    EditText newTask;
    Button addTask, saveTasks;
    ListView taskList;
    List<String> myTasks;
    Set myTasksSet;

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

    @Override
    public void onBackPressed() {
        if (changesMade) {
            changesMade = false;

            new AlertDialog.Builder(context)
                .setTitle("Save Changes")
                .setMessage("Changes were made.\nSave progress?")
                .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int idx) {
                        dialogInterface.dismiss();
                        userUtil.saveUserTasks(currentUser, myTasks);
                        TaskActivity.super.onBackPressed();
                    }
                })
                .setNegativeButton("No", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int idx) {
                        dialogInterface.dismiss();
                        finish();
                    }
                })
                .show();
        } else {
            super.onBackPressed();
        }
    }

    private void setPointer() {
        this.context = this;
        userUtil.setContext(context);

        //get current Intent
        Intent intent = getIntent();

        //extract passed info
        this.currentUser = intent.getStringExtra("userName");

        taskUser = findViewById(R.id.txtUserName);
        taskUser.setText(currentUser);

        //TaskAdapter myAdapter = new TaskAdapter(context, myTasks);
        taskList = findViewById(R.id.lstTask);
        taskList.setAdapter(myAdapter);

        newTask = findViewById(R.id.etMyTask);

        addTask = findViewById(R.id.btnTaskAdd);
        addTask.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (newTask.getText().toString().isEmpty()) {
                    return;
                }

                myTasks.add(newTask.getText().toString());
                //myAdapter = new TaskAdapter(context, myTasks);
                //taskList.setAdapter(myAdapter);
                newTask.setText("");

                changesMade = true;
            }
        });

        saveTasks = findViewById(R.id.btnTaskSave);
        saveTasks.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                userUtil.saveUserTasks(currentUser, myTasks);

                changesMade = false;
            }
        });

        setData();






        /* DEBUG */
        Button debugTask = findViewById(R.id.btnTaskDEBUG);
        debugTask.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                myTasks.add("Le Asics");
                myTasks.add("le Curason");
                myTasks.add("Le Eiffel");
                myTasks.add("Le Le");
                changesMade = true;

                //myAdapter = new TaskAdapter(context, myTasks);
                //taskList.setAdapter(myAdapter);
                myAdapter.notifyDataSetChanged();
            }
        });

    }

    private void setData() {
        SharedPreferences prefs = context.getSharedPreferences(currentUser, Context.MODE_PRIVATE);
        myTasksSet = prefs.getStringSet(currentUser, new HashSet<String>());
        myTasks = new ArrayList<>();

        if (myTasksSet.size() > 0) {
            myTasks.addAll(myTasksSet);
        }

        myAdapter = new TaskAdapter(context, myTasks);
        taskList.setAdapter(myAdapter);
    }

}