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- public abstract class SingleFragmentActivity extends AppCompatActivity {
- protected abstract Fragment createFragment();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_fragment);
- FragmentManager fm = getSupportFragmentManager();
- Fragment fragment = fm.findFragmentById(R.id.fragment_container);
- if (fragment == null) {
- fragment = createFragment();
- fm.beginTransaction()
- .add(R.id.fragment_container, fragment)
- .commit();
- }
- }
- }
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