Petrus K. Petrus K. - 10 months ago 76
Java Question

setContentView(R.layout.main); error

package com.elfapp;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

private Button btn_Login;
private EditText et_UserName;

public void onCreate(Bundle savedInstanceState) {

btn_Login = (Button) findViewById(;

et_UserName = (EditText) findViewById(;

public void onClick(View v) {
if (v.equals(btn_Login)) {
// skriver ut en toast när man klickar på knappen
Toast.makeText(MainActivity.this, "Ansluter till server...", Toast.LENGTH_SHORT).show();

// används i debuggern för att påvisa att programmet exekverat hit
Log.v("ThisApp", "onClick Successful");

// TODO skickar det som står i et_UserName till controller (genom TCP/IP), som ska kolla om användaren finns
// send et_UserName.getText().toString() to controller

// if(username exists)
Intent intent = new Intent(this, RoomActivity.class);


I'm getting an error on the line containing

Not sure about what the error/exception is because I'm not used to working in Eclipse..

Answer Source

Just take 2 steps and problem would be more likely to get solved:

Step 1: Clean your project by clicking Project -> Clean.

Step 2: Rebuild your project by clicking Project -> Build All.

Also make sure that your layout xml files are syntax error free and you don't have any image which has non-acceptable names (such as a "-" between image name).

Also I request you to have a look at problems window and let me know what errors are being shown there.