MainActivity.java

package sample.github.nisrulz.usingdagger2;

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

public class MainActivity extends AppCompatActivity {

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

    if (savedInstanceState == null) {
      getSupportFragmentManager().beginTransaction()
          .add(android.R.id.content, new MainFragment())
          .commit();
    }
  }
}