cannot convert from android.app.FragmentManager to android.support.v4.app.FragmentManager

Question

I am creating an app using Fragments for tablet.I have so far created some buttons on the left side and the fragments appear on clicking the buttons.

But i am experiencing error in my MainActivity.java file "Type mismatch error:cannot convert from android.app.FragmentManager to android.support.v4.app.FragmentManager" And that is the main reason that i cannot implement it.I have already imported android.support.v4.app.FragmentManager.

How can i resolve my problem?

My code for MainActivity.java

      import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.view.View; import android.widget.Button;  public class MainActivity extends Activity {     Fragment fragment;     Button btn1,btn2,btn3,btn4,btn5,btn6;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         btn1=(Button)findViewById(R.id.btn1);         btn2=(Button)findViewById(R.id.btn2);         btn3=(Button)findViewById(R.id.btn3);         btn4=(Button)findViewById(R.id.btn4);         btn5=(Button)findViewById(R.id.btn5);         btn6=(Button)findViewById(R.id.btn6);          FragmentManager fm=getFragmentManager();         FragmentTransaction ft=fm.beginTransaction();          StartFragment myfragment=new StartFragment();         ft.add(R.id.myfragment,myfragment);         ft.commit();         btn4.setOnClickListener(btnOnClickListener);         btn5.setOnClickListener(btnOnClickListener);         btn6.setOnClickListener(btnOnClickListener);     }            Button.OnClickListener btnOnClickListener=new Button.OnClickListener(){             @Override              public void onClick(View v)             {                 Fragment newfragment;                 if(v==btn1)                 {                     newfragment=new Fragment1();                 }                 else if(v==btn2)                 {                     newfragment=new Fragment2();                 }                 else if(v==btn3)                 {                     newfragment=new Fragment3();                 }                 else if(v==btn4)                 {                     newfragment=new Fragment4();                 }                 else if(v==btn5)                 {                     newfragment=new Fragment5();                 }                 else if(v==btn6)                 {                     newfragment=new Fragment6();                 }                 else                  {                     newfragment=new StartFragment();                 }                 FragmentTransaction transaction=getFragmentManager.beginTransaction();                 transaction.replace(R.id.myfragment,newfragment);                 transaction.addToBackStack(null);                 transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);                 transaction.commit();             }         };         } 

Answer 1

You need to use getSupportFragmentManager() in your code, not getFragmentManager() - see here for more details.

You also need to extend your class from android.support.v4.app.FragmentActivity, not just from standard android.Activity to get this method.