Error in running android app

Question

i just started Android Studio and i am having error as i try to run my app.This is the error message i got:

Error:(53, 58) error: method getId in class View cannot be applied to given types;
required: no arguments
found: int
reason: actual and formal argument lists differ in length
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.

Compilation failed; see the compiler error output for details.

My java code are below:

package com.ekesoft.myapplication;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;
import android.widget.Button;
import android.graphics.Color;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Layout
        RelativeLayout ekeLayout = new RelativeLayout(this);
        ekeLayout.setBackgroundColor(Color.BLUE);

        //Button
        Button redButton = new Button(this);
        redButton.setBackgroundColor(Color.GRAY);
        redButton.setText("Log in");

        //User name field
        EditText Username = new EditText(this);
        Username.setBackgroundColor(Color.WHITE);


        redButton.setId(2);
        Username.setId(3);


        //Creat a container for our layout
        RelativeLayout.LayoutParams ekedetail = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT,
                RelativeLayout.LayoutParams.WRAP_CONTENT

        );
        RelativeLayout.LayoutParams Userdetail = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT,
                RelativeLayout.LayoutParams.WRAP_CONTENT

        );

        //Set rules to position widget
        Userdetail.addRule(RelativeLayout.ABOVE,redButton.getId(2));
        Userdetail.addRule(RelativeLayout.CENTER_VERTICAL);
        Userdetail.setMargins(0,0,0,100);



        //Set the position of our container
        ekedetail.addRule(RelativeLayout.CENTER_HORIZONTAL);
        ekedetail.addRule(RelativeLayout.CENTER_VERTICAL);



        //Add widget to the layout, is now a child of the layout
        ekeLayout.addView(redButton,ekedetail);
        ekeLayout.addView(Username,Userdetail);

        //Set this as the content to be displayed
        setContentView(ekeLayout);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

}

My aim was to build simple interface using java.

Answer 1

the problem is this line

redButton.getId(2)

View.getId() doesn't take parameters. Here you can find the documentation. You have to remove the parameter. Eg

 redButton.getId()

Answer 2

In the message you have the answer:

Error:(53, 58)
error: method getId in class View cannot be applied to given types;
required: no arguments
found: int
reason: actual and formal argument lists differ in length
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.

---

Problem is method getId(int) is not defined in Android Button, but you can find getId()

So this line

Userdetail.addRule(RelativeLayout.ABOVE,redButton.getId(2));
//                                                      ↑ here you have an int!

Must be

Userdetail.addRule(RelativeLayout.ABOVE,redButton.getId());
//                                                      ↑ here!

NOTE: The getters methods of object's attributes usually does not accept any parameter.

Answer 3

You can do it like this

int id1=1;
int id2=2;

Then, write it as:

username.setId(id1);
redbutton.setId(id2);

Finally, don't pass any argument below in getId :

usernamedetails.addRule(RelativeLayout.ABOVE,redbutton.getId());