Cannot Resolve Method Placeholderfragment Error

I'm really stuck on this error (below): @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.

Solution 1:

• You probably extending the wrong version of Fragment

In your file PlaceholderFragment.java, first make sure you extend Fragment:

publicclassPlaceholderFragmentextendsFragment { //...

Then, check the imports at the beginning of that file. There should be the line:

import android.app.Fragment;

and NOT the line:

import android.support.v4.app.Fragment;

Try not to mix "normal" and "v4" Fragments, they have the same name and do the same things but they are actually different classes.

Solution 2:

I had to import android.support.v4.app.Fragment to fix this problem.

In my case I was using minSdkVersion 8 and I had created a Activity class java > Package > Acitivity > BlankActivity. This created activity class had a inner class public static class PlaceholderFragment extends Fragment. This inner class was used in onCreate() in

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

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