package com.starter.android_starter;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent intent = new Intent(this,Login.class);
        startActivity(intent);
    }
}

@@ -196,121 +196,400 @@
 y %7B%0A
-%0A    @Override%0A    protected void onCreate(Bundle savedInstanceState) %7B%0A        super.onCreate(savedInstanceState
+private static final String TWITTER_KEY = %22your twitter key%22;%0A    private static final String TWITTER_SECRET = %22your twitter secret%22;%0A%0A    @Override%0A    protected void onCreate(Bundle savedInstanceState) %7B%0A        super.onCreate(savedInstanceState);%0A          TwitterAuthConfig authConfig = new TwitterAuthConfig(TWITTER_KEY, TWITTER_SECRET);%0A        Fabric.with(this, new Twitter(authConfig)
 );%0A 

Update MainActivity.java