Run time error =[

Oh, sorry for the lack of the information. Give me some time, I will organize the information and post it here. (I wish I can upload images here...)

The following are the errors from the log cat (sorry I just copy and paste it here).

04-12 17:43:13.107: E/AndroidRuntime(3711): FATAL EXCEPTION: main 04-12 17:43:13.107: E/AndroidRuntime(3711): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ribbit/com.example.ribbit.LoginActivity}: java.lang.NullPointerException 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.os.Handler.dispatchMessage(Handler.java:99) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.os.Looper.loop(Looper.java:130) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread.main(ActivityThread.java:3683) 04-12 17:43:13.107: E/AndroidRuntime(3711): at java.lang.reflect.Method.invokeNative(Native Method) 04-12 17:43:13.107: E/AndroidRuntime(3711): at java.lang.reflect.Method.invoke(Method.java:507) 04-12 17:43:13.107: E/AndroidRuntime(3711): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 04-12 17:43:13.107: E/AndroidRuntime(3711): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 04-12 17:43:13.107: E/AndroidRuntime(3711): at dalvik.system.NativeStart.main(Native Method) 04-12 17:43:13.107: E/AndroidRuntime(3711): Caused by: java.lang.NullPointerException 04-12 17:43:13.107: E/AndroidRuntime(3711): at com.example.ribbit.LoginActivity.onCreate(LoginActivity.java:28) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 04-12 17:43:13.107: E/AndroidRuntime(3711): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 04-12 17:43:13.107: E/AndroidRuntime(3711): ... 11 more

Here is the problem Line:

Caused by: java.lang.NullPointerException 04-12 17:43:13.107: E/AndroidRuntime(3711): at com.example.ribbit.LoginActivity.onCreate(LoginActivity.java:28)

Can you paste in your LoginActivity Code, and if possible highlight line 28.

Paul :)

You can upload images to imgur.com for free and then paste the link here if you want.

Here are the codes.

public class LoginActivity extends ActionBarActivity {

protected TextView mSignUpTextView;

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

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();

    mSignUpTextView = (TextView)findViewById(R.id.signUpText);

            //Line 28
    mSignUpTextView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(LoginActivity.this, SignUpActivity.class);
            startActivity(intent);

        }
    });


    }
}

I have the same issue. This is happening I think because in the wizard to create a new activity, it creates both an activity.xml file AND a fragment.xml file. Something to do with fragments...

Please see the question I just asked.