title: cannot resolve method add(int , new tFragment()).commit() in android studion 1.0.1
body: <p>I was working with fragments in android studio 1.0.1. Just as network process are not good to be done in the main UI, i moved my code to a different class containing fragments.
  But what happened afterwards is not helping me proceed at all. the error i get is cannot resolve method <code>add(R.id.container, new com.sunshine.example.sunshine.app.Fragment).commit();</code>
  down here is the code snippet of my MainActivity class but all is well with Fragment class.</p>
  
  <pre><code>package com.sunshine.example.sunshine.app;
        import android.support.v7.app.ActionBarActivity;
        import android.support.v4.app.Fragment; 
        import android.os.Bundle;    
        import android.view.Menu; 
        import    android.view.MenuItem; 
  
        public class    MainActivity extends    ActionBarActivity {
  
        @Override    
        protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction().
                    add(R.id.container, new ForecastFragment()).commit();
  
  
        }    }
  
        @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);    }
        }
  </code></pre>