Android simple login screen crashes app when logging, no errors in eclipse. Which java class activity is at fault?

package
            com.android.drinksonme;

import
            android.app.Activity;


import
            android.content.Intent;
import android.util.Log;
import
            android.os.Bundle;
import android.view.View;
import
            android.view.View.OnClickListener;
import
            android.widget.Button;
import android.widget.EditText;
import
            android.widget.TextView;

public class Screen2 extends Activity
            {


 // Declare our Views, so we can access them
            later
 private EditText etUsername;
 private EditText
            etPassword;
 private Button btnLogin;
 //private Button
            btnSignUp;
 private TextView lblResult;


            @Override
 public void onCreate(Bundle savedInstanceState)
            {

 super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

 // Get the EditText and Button
            References
 etUsername = (EditText)findViewById(R.id.username);

            etPassword = (EditText)findViewById(R.id.password);
 btnLogin =
            (Button)findViewById(R.id.login_button);
 // btnSignUp =
            (Button)findViewById(R.id.signup_button);
 lblResult =
            (TextView)findViewById(R.id.result);



            btnLogin.setOnClickListener(new OnClickListener() {
 @Override

            public void onClick(View v) {
 String username =
            etUsername.getText().toString();
 String password =
            etPassword.getText().toString();

 if(username.equals("test")
            && password.equals("test")){
 Intent i = new Intent(Screen2.this,
            DrinksTwitter.class);
 startActivity(i);
 } else
            {

 lblResult.setText("Invalid username or password."); 

            } 
 }
 });
 }
}
 /* final Intent k =
            new Intent(Screen2.this, SignUp.class);
 btnSignUp.setOnClickListener(new
            OnClickListener() {
 public void onClick(View v) { 

            startActivity(k);


            }*/

This is the log
trace:

12-29 17:55:50.215:
            WARN/KeyCharacterMap(276): No keyboard for id 0
12-29 17:55:50.215:
            WARN/KeyCharacterMap(276): Using default keymap:
            /system/usr/keychars/qwerty.kcm.bin
12-29 17:55:56.645: DEBUG/dalvikvm(120):
            GC_FOR_MALLOC freed 1585 objects / 216672 bytes in 77ms
12-29 17:55:57.615:
            DEBUG/dalvikvm(120): GC_EXTERNAL_ALLOC freed 1934 objects / 132912 bytes in
            74ms
12-29 17:55:59.136: WARN/KeyCharacterMap(120): No keyboard for id
            0

12-29 17:55:59.165: WARN/KeyCharacterMap(120): Using default
            keymap: /system/usr/keychars/qwerty.kcm.bin
12-29 17:56:03.435:
            INFO/ActivityManager(58): Starting activity: Intent {
            cmp=com.android.drinksonme/.DrinksTwitter }
12-29 17:56:03.965:
            DEBUG/AndroidRuntime(276): Shutting down VM
12-29 17:56:03.965:
            WARN/dalvikvm(276): threadid=1: thread exiting with uncaught exception
            (group=0x4001d800)
12-29 17:56:04.335: ERROR/AndroidRuntime(276): FATAL
            EXCEPTION: main
12-29 17:56:04.335: ERROR/AndroidRuntime(276):
            java.lang.RuntimeException: Unable to start activity
            ComponentInfo{com.android.drinksonme/com.android.drinksonme.DrinksTwitter}:
            java.lang.NullPointerException
12-29 17:56:04.335: ERROR/AndroidRuntime(276):
            at
            android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)

12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.os.Handler.dispatchMessage(Handler.java:99)
12-29 17:56:04.335:
            ERROR/AndroidRuntime(276): at android.os.Looper.loop(Looper.java:123)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.ActivityThread.main(ActivityThread.java:4627)
12-29 17:56:04.335:
            ERROR/AndroidRuntime(276): at java.lang.reflect.Method.invokeNative(Native
            Method)
12-29 17:56:04.335: ERROR/AndroidRuntime(276): at
            java.lang.reflect.Method.invoke(Method.java:521)
12-29 17:56:04.335:
            ERROR/AndroidRuntime(276): at
            com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at dalvik.system.NativeStart.main(Native
            Method)
12-29 17:56:04.335: ERROR/AndroidRuntime(276): Caused by:
            java.lang.NullPointerException
12-29 17:56:04.335: ERROR/AndroidRuntime(276):
            at
            com.android.drinksonme.DrinksTwitter.onCreate(DrinksTwitter.java:24)

12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): at
            android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-29
            17:56:04.335: ERROR/AndroidRuntime(276): ... 11 more
12-29 17:56:04.415:
            WARN/ActivityManager(58): Force finishing activity
            com.android.drinksonme/.DrinksTwitter
12-29 17:56:04.435:
            WARN/ActivityManager(58): Force finishing activity
            com.android.drinksonme/.Screen2
12-29 17:56:04.975: WARN/ActivityManager(58):
            Activity pause timeout for HistoryRecord{43f9f0c8
            com.android.drinksonme/.DrinksTwitter}
12-29 17:56:05.045:
            INFO/ARMAssembler(58): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp]
            (47 ins) at [0x340c68:0x340d24] in 4299931 ns
12-29 17:56:15.909:
            WARN/ActivityManager(58): Activity destroy timeout for HistoryRecord{43f470c8
            com.android.drinksonme/.Screen2}
12-29 17:56:15.909: WARN/ActivityManager(58):
            Activity destroy timeout for HistoryRecord{43f9f0c8
            com.android.drinksonme/.DrinksTwitter}

Snippet
from DrinksTwitter.java:
@Override
public void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.specials);

            WebView mWebView = (WebView)
            findViewById(R.id.drinks);

/line:24/
mWebView.getSettings().setJavaScriptEnabled(true);

mWebView.loadUrl("http://www.yahoo.com");
}