passing methods between java files

[henry razoskin]

I am on android studio and I am trying to use a class method in other java files. I have the classes in the permissionHelper.java file and I am currently trying to reference them in the homePage.java file. I will have to use them in other files too though. With the current code, I get the  "getToastDisplay in permissionHelper cannot be applied to: expected parameters:  actual argument:" error. Anybody know how to solve this issue? Any help is appreciated.

permissionHelper.java :

import android.Manifest;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.widget.Toast;


public class permissionHelper extends homePage {

    public static final int request = 1;

    //obtaining permission
    public void getPermission() {

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_SMS)
                != PackageManager.PERMISSION_GRANTED) {
            if (shouldShowRequestPermissionRationale(
                    Manifest.permission.READ_SMS)) {
                Toast.makeText(this, "Please allow SMS permission", Toast.LENGTH_SHORT).show();
            }
            requestPermissions(new String[]{Manifest.permission.READ_SMS}, request);
        }
    }

    //toast display
    @Override
    public void getToastDisplay(int requestCode,
                                 @NonNull String permissions[],
                                 @NonNull int[] grantResults) {
        if(requestCode == request) {
            if(grantResults.length == 1 &&
                    grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Read SMS permission granted", Toast.LENGTH_SHORT).show();
                refreshSmsInbox();
            }else {
                Toast.makeText(this, "Read SMS permission denied", Toast.LENGTH_SHORT).show();
            }
        }

        else {
            super.getToastDisplay(requestCode, permissions, grantResults);
        }
    }
}

homePage.java:

import android.Manifest;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.view.Gravity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.content.Intent;
import android.support.design.widget.FloatingActionButton;
import java.util.ArrayList;

public class homePage extends AppCompatActivity {

        private ListView mDrawerList;
        private DrawerLayout mDrawerLayout;
        private ArrayAdapter<String> mAdapter;
        private boolean firstResume = false;

        ArrayList<String> smsMessagesList = new ArrayList<>();
        ListView messages;
        ArrayAdapter arrayAdapter;
        private static homePage inst;

     
        public static homePage instance() {
            return inst;
        }
                     
        public void refreshSmsInbox() {
            ContentResolver contentResolver = getContentResolver();
            Cursor smsInboxCursor = contentResolver.query(Uri.parse("content://sms/inbox"), null, null, null, null);
            int indexBody = smsInboxCursor.getColumnIndex("body");
            int indexAddress = smsInboxCursor.getColumnIndex("address");

            if(indexBody < 0 || !smsInboxCursor.moveToFirst()) return;
            arrayAdapter.clear();
            do {
                String str = "SMS from: " + smsInboxCursor.getString(indexAddress) +
                        "\n" + smsInboxCursor.getString(indexBody) + "\n";
                arrayAdapter.add(str);
            } while(smsInboxCursor.moveToNext());
        }

        public void updateInbox(final String smsMessage) {
            arrayAdapter.insert(smsMessage, 0);
            arrayAdapter.notifyDataSetChanged();
         }

        private void addDrawerItems() {
        //side drawer things
            String[] osArray = { "Sent", "Patients", "Folders", "Trash", "Settings" };
            mAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, osArray);
            mDrawerList.setAdapter(mAdapter);

            mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                    if(position == 4) {

                        Intent settingsIntent = new Intent(homePage.this, settingsPage.class);
                        startActivity(settingsIntent);
                    }
                }
            });
        }

        private void FABListener() {
        //FAB functions
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    Intent newMessage = new Intent(homePage.this, newMessagePage.class);
                    startActivity(newMessage);
                }
            });
        }

    @Override
    protected void onStart() {
        super.onStart();
        inst = this;
    }

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

            mDrawerList = (ListView)findViewById(R.id.navList);
            mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);

            messages = (ListView) findViewById(R.id.messages);
            arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, smsMessagesList);
            messages.setAdapter(arrayAdapter);

            if(ContextCompat.checkSelfPermission(this,Manifest.permission.READ_SMS) != PackageManager.PERMISSION_GRANTED) {
              
                //errors begin here=========================

                permissionHelper SMSCheck = new permissionHelper();

                SMSCheck.getPermission();
                SMSCheck.getToastDisplay();

               //errors end here===========================

            }else {
                refreshSmsInbox();
            }

            addDrawerItems();
            FABListener();
        }

        @Override
        protected void onResume() {
            super.onResume();

            if(firstResume) {
                mDrawerLayout.openDrawer(Gravity.START);
            }
            firstResume = false;
        }
    }

[Giovanni Montano]

java does not work like this.
try to instatiate the method as static in the helperclass, then control you pass the right parameters.

[Norm Radder]

expected parameters:  actual argument:

It would be helpful if you copied the full text of the error message and paste it in your post.

The getToastDisplay method defined in permissionHelper takes arguments.  The code that is trying to call it doesn't provide any arguments.