MainActivity.java

package com.example.moodtracker;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.core.content.ContextCompat;
import androidx.core.view.GestureDetectorCompat;

import com.google.gson.Gson;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;



public class MainActivity extends AppCompatActivity {
    private Integer scrn = 3; // so normal will be the first screen
    private static final String MyPREFERENCES = "MoodTracker" ;
    private SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd", Locale.US);
    private Calendar rightNow;
    private String todaysDate; // = "x";
    private GestureDetectorCompat mGestureDetector;
    private ConstraintLayout mainLayout;
    private Mood currentMood = new Mood();
    private Integer defaultState = 3;
    private Gson gson = new Gson();

    private SharedPreferences prefs;
    private SharedPreferences.Editor prefsEdit;


    public void swapDisplay(ConstraintLayout mainLayout, int scrn) {

        int bkgColor = 0;
        ImageView imgSmiley;
        imgSmiley = findViewById(R.id.imageSmiley);

        Drawable img;

        switch (scrn)
        {
            case 1:
                // change background color
                bkgColor = ContextCompat.getColor(getBaseContext(), R.color.disappointed);
                mainLayout.setBackgroundColor(bkgColor);
                // change smiley
                img = getDrawable(R.drawable.smiley_disappointed);
                imgSmiley.setImageDrawable(img);
                currentMood.setIndex(scrn);
                saveMood();
                break;
            case 2:
                // change background color
                bkgColor = ContextCompat.getColor(getBaseContext(), R.color.sad);
                mainLayout.setBackgroundColor(bkgColor);
                // change smiley
                img = getDrawable(R.drawable.smiley_sad);
                imgSmiley.setImageDrawable(img);
                currentMood.setIndex(scrn);
                saveMood();
                break;
            case 3:
                // change background color
                bkgColor = ContextCompat.getColor(getBaseContext(), R.color.normal);
                mainLayout.setBackgroundColor(bkgColor);
                // change smiley
                img = getDrawable(R.drawable.smiley_normal);
                imgSmiley.setImageDrawable(img);
                currentMood.setIndex(scrn);
                saveMood();
                break;
            case 4:
                // change background color
                bkgColor = ContextCompat.getColor(getBaseContext(), R.color.happy);
                mainLayout.setBackgroundColor(bkgColor);
                // change smiley
                img = getDrawable(R.drawable.smiley_happy);
                imgSmiley.setImageDrawable(img);
                currentMood.setIndex(scrn);
                saveMood();
                break;
            case 5:
                // change background color
                bkgColor = ContextCompat.getColor(getBaseContext(), R.color.super_happy);
                mainLayout.setBackgroundColor(bkgColor);
                // change smiley
                img = getDrawable(R.drawable.smiley_super_happy);
                imgSmiley.setImageDrawable(img);
                currentMood.setIndex(scrn);
                saveMood();
                break;
            default: // do nothing if scrn is out of range
                break;
        }
    }

    private void showDialog(ConstraintLayout mainLayout) {

        MainActivity mainActivity;

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        // Inflate and set the layout for the dialog
        // Pass null as the parent view because its going in the dialog layout
        LayoutInflater inflater = LayoutInflater.from(this);

        //builder.setView(inflater.inflate(R.layout.dialog_get_comment, null))
        View dialogview = inflater.inflate(R.layout.dialog_get_comment, null);
        final EditText newNote = dialogview.findViewById(R.id.newComment);
        builder.setView(dialogview).setMessage(getString(R.string.todsys_note));
     //   final MainActivity finalMainActivity = new MainActivity();
        builder.setPositiveButton(R.string.save, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface arg0, int arg1) {
            //Mood currentMood = new Mood();
            String retrieveNote = newNote.getText().toString().trim();
            //MainActivity callingActivity = (MainActivity) getCallingActivity();
            currentMood.setComment(retrieveNote);
            saveMood();

         //   Toast.makeText(MainActivity.this,retrieveNote,Toast.LENGTH_LONG).show();
            // TODO add the save routine here...set the date and note, then save 'em
        }
        });

        builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface arg0, int arg1) {
            Toast.makeText(MainActivity.this,"You clicked CANCEL",Toast.LENGTH_LONG).show();
            }
        });

        builder.show();
    }

    public void saveMood (){
//        if (prefsEdit == null) {
//            Toast.makeText(MainActivity.this, "saveMood: prefsEdit is not NULL", Toast.LENGTH_LONG).show();
//        };
        // serialize object, then use string for the following save
        String moodStr = gson.toJson(currentMood);
        rightNow = Calendar.getInstance();

        //String moodStr = "fubar";
        todaysDate = sdf.format(rightNow.getTime());
     //   prefsEdit.putString(todaysDate, moodStr); //"skdj");
     //   prefsEdit.apply();
        prefs = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
        prefsEdit = prefs.edit();
        prefsEdit.putString(todaysDate, moodStr);
        prefsEdit.apply();
        Toast.makeText(MainActivity.this,moodStr,Toast.LENGTH_LONG).show();
        // TEST
        // int svd = prefs.getInt(todaysDate, 99);
        // TextView textView=findViewById(R.id.textView);
        // textView.setText(String.format(Locale.US, "Fubar: %d %s", svd, prefs.contains(todaysDate)));
        // END TEST
    }

    private class GestureListener extends GestureDetector.SimpleOnGestureListener {

        @Override
        public boolean onFling(MotionEvent m1, MotionEvent m2, float velocityX, float velocityY) {
            if ( velocityX > velocityY ) {
                if (++scrn > 5) {scrn = 1;}  // roll over to min from max
                swapDisplay(mainLayout, scrn);
                Toast.makeText(MainActivity.this, "Fling up"+scrn.toString(), Toast.LENGTH_SHORT).show();}
            if ( velocityY > velocityX ) {
                if (--scrn < 1) {scrn = 5;}  // roll over to max from min
                swapDisplay(mainLayout, scrn);
                Toast.makeText(MainActivity.this, "Fling down"+scrn.toString(), Toast.LENGTH_SHORT).show();}
            return super.onFling(m1, m2, velocityX, velocityY);
        }
    }

    public boolean onTouchEvent(MotionEvent event) {
        mGestureDetector.onTouchEvent(event);
        return super.onTouchEvent(event);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     //   prefs = getSharedPreferences("MoodTracker", MODE_PRIVATE);
        mainLayout = findViewById(R.id.layoutView);

        int bkgColor = ContextCompat.getColor(getBaseContext(),R.color.normal);
        mainLayout.setBackgroundColor(bkgColor);

     //   prefs = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

        ImageButton btnAddNote = findViewById(R.id.btnAddNote);
        btnAddNote.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(mainLayout);
//                swapDisplay(mainLayout);
            }
        });

        ImageButton btnShowHistory = findViewById(R.id.btnShowHistory);
        btnShowHistory.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), ShowHistory.class);
                startActivity(intent);
            }
        });

        mGestureDetector = new GestureDetectorCompat(this, new  GestureListener());

        currentMood.setIndex(defaultState);
        currentMood.setComment("");


        //return(mainLayout);
    }

    @Override
    protected void onStart() {
        super.onStart();
        //todaysDate = sdf.format(new Date());
      //  rightNow = Calendar.getInstance();
      //  todaysDate = sdf.format(rightNow.getTime());
        // cannot get sharedPreferences until onCreate is finished
      //  prefs = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
      //  prefsEdit = prefs.edit();
      //  prefsEdit.putString(todaysDate, ""); //"skdj");
      //  prefsEdit.apply();

       // if ((prefs != null) && (prefsEdit != null)){
       //     Toast.makeText(MainActivity.this, "onStart: prefs OK "+todaysDate, Toast.LENGTH_LONG).show();
     //   }
    }
}