Wsrtjtyk

I dont seem to understand why the back button in this activity wont work.What can i do to fix this kindly.I have tried a few other solutions but most of them dont seem to work?I expect the the user to return to the MainActivity when the button is pressed.

I have already added the parent activity name.Do you guys have any suggestion to help out?

public class WaterSelectionActivity extends AppCompatActivity {

//Firebase Auth for Userlocation

private FirebaseAuth mAuth;

String currentUser;

DatabaseReference mgetUsername;

final ArrayList<String> selection = new ArrayList<>();

final ArrayList<String> pickedNumber = new ArrayList<>();

Switch simpleSwitch;

ActionBar actionBar;

ScrollableNumberPicker numberPicker1;

CheckBox checkbox1;

CheckBox checkbox2;

ImageView mimgop;

ImageView mimageViewop;



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_water_selection);

    mAuth = FirebaseAuth.getInstance();

    currentUser = mAuth.getCurrentUser().getUid();

    mgetUsername = FirebaseDatabase.getInstance().getReference().child("Users").child(currentUser);

    simpleSwitch = (Switch) findViewById(R.id.switch2);

    mimageViewop = (ImageView) findViewById(R.id.imageViewop);

    mimageViewop.animate().alpha(1f).setDuration(2000);

    mimgop = (ImageView) findViewById(R.id.imgop);

    mimageViewop.animate().alpha(1f).setDuration(3000);

    checkbox1 = (CheckBox) findViewById(R.id.checkBox);

    checkbox2 = (CheckBox) findViewById(R.id.secondCheckbox);

    numberPicker1 = (ScrollableNumberPicker) findViewById(R.id.number_picker_horizontal);

    numberPicker1.setMaxValue(10);

    numberPicker1.setMinValue(3);

    numberPicker1.setListener(new ScrollableNumberPickerListener() {

        @Override

        public void onNumberPicked(int value) {

            // Do some magic

            pickedNumber.add(String.valueOf(value));

        }

    });

    actionBar = getSupportActionBar();

    actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#FF8C00")));

    actionBar.setTitle("Water Specifics");

    //set the current state of a Switch

    simpleSwitch.setBackgroundColor(Color.parseColor("#FF8C00"));

    simpleSwitch.setChecked(false);

}



public void selectItem(View view) {

    boolean checked = ((CheckBox) view).isChecked();

    if (view.getId() == R.id.checkBox) {

        if (checked) {

            selection.add("15ltr");

            checkbox2.setVisibility(View.INVISIBLE);

        } else {

            selection.remove("15ltr");

            checkbox2.setVisibility(View.VISIBLE);

        }

    } else {

        if (checked) {

            selection.add("2000ltr");

            checkbox1.setVisibility(View.INVISIBLE);

        } else {

            selection.remove("2000ltr");

            checkbox1.setVisibility(View.VISIBLE);

        }

    }

}



public void submitWater(View view) {

    //Getting the switch value

    String statusSwitch1 = "";

    if (simpleSwitch.isChecked()) {

        statusSwitch1 = statusSwitch1 + "Fresh Water";

    } else {

        statusSwitch1 = statusSwitch1 + "Regular Salty Water";

    }

    Toast.makeText(this, statusSwitch1, Toast.LENGTH_SHORT).show();

    String finalSelection = "";

    for (String Selections : selection) {

        finalSelection = finalSelection + selection + "n";

    }

    Toast.makeText(this, finalSelection, Toast.LENGTH_SHORT).show();

    final String finalStatusSwitch = statusSwitch1;

    final String finalSelection1 = finalSelection;

    numberPicker1.setListener(new ScrollableNumberPickerListener() {

        @Override

        public void onNumberPicked(int value) {

            // Do some magic

            pickedNumber.add(String.valueOf(value));

        }

    });

    Toast.makeText(WaterSelectionActivity.this, pickedNumber.toString(), Toast.LENGTH_SHORT).show();

    final String finalStatusSwitch1 = statusSwitch1;

    final String finalSelection2 = finalSelection;

    mgetUsername.addValueEventListener(new ValueEventListener() {

        @Override

        public void onDataChange(DataSnapshot dataSnapshot) {

            //Values

            String name = dataSnapshot.child("name").getValue().toString();

            String waterType = finalStatusSwitch1;

            String container = finalSelection2;

            String quantity = pickedNumber.toString();

            //Put these values in an intent and send them to the next page

        }

        @Override

        public void onCancelled(DatabaseError databaseError) {

        }

    });

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

    return onKey(keyCode, event);

}

@Override

public boolean onKeyUp(int keyCode, KeyEvent event) {

    return onKey(keyCode, event);

}

private boolean onKey(int keyCode, KeyEvent event) {

    if (numberPicker1.isFocused()) {

        return numberPicker1.handleKeyEvent(keyCode, event);

    }

    return false;

}

}