How can i transplant from activity to fragment? : Now i'm trying to transparent opensource expandable layout but the problem is that source made by activity but i want to apply my fragment layout 
what should i do? 
When i try to Transplant it's occured error... 

 ****This is what i want to try transparent****

   
    package com.expandablelistdemo;

    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ExpandableListView;
    import com.expandablelistdemo.Model.DataItem;
    import com.expandablelistdemo.Model.SubCategoryItem;
    import java.util.ArrayList;
    import java.util.HashMap;

    public class MainActivity extends AppCompatActivity {

    private Button btn;
    private ExpandableListView lvCategory;

    private ArrayList<DataItem> arCategory;
    private ArrayList<SubCategoryItem> arSubCategory;
    private ArrayList<ArrayList<SubCategoryItem>> arSubCategoryFinal;

    private ArrayList<HashMap<String, String>> parentItems;
    private ArrayList<ArrayList<HashMap<String, String>>> childItems;
    private MyCategoriesExpandableListAdapter myCategoriesExpandableListAdapter;

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

        btn = findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,CheckedActivity.class);
                startActivity(intent);
            }
        });

        setupReferences();
    }

    private void setupReferences() {

        lvCategory = findViewById(R.id.lvCategory);
        arCategory = new ArrayList<>();
        arSubCategory = new ArrayList<>();
        parentItems = new ArrayList<>();
        childItems = new ArrayList<>();

        DataItem dataItem = new DataItem();
        dataItem.setCategoryId("1");
        dataItem.setCategoryName("Adventure");

        arSubCategory = new ArrayList<>();
        for(int i = 1; i < 6; i++) {

            SubCategoryItem subCategoryItem = new SubCategoryItem();
            subCategoryItem.setCategoryId(String.valueOf(i));
            subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
            subCategoryItem.setSubCategoryName("Adventure: "+i);
            arSubCategory.add(subCategoryItem);
        }
        dataItem.setSubCategory(arSubCategory);
        arCategory.add(dataItem);

        dataItem = new DataItem();
        dataItem.setCategoryId("2");
        dataItem.setCategoryName("Art");
        arSubCategory = new ArrayList<>();
        for(int j = 1; j < 6; j++) {

            SubCategoryItem subCategoryItem = new SubCategoryItem();
            subCategoryItem.setCategoryId(String.valueOf(j));
            subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
            subCategoryItem.setSubCategoryName("Art: "+j);
            arSubCategory.add(subCategoryItem);
        }
        dataItem.setSubCategory(arSubCategory);
        arCategory.add(dataItem);

        dataItem = new DataItem();
        dataItem.setCategoryId("3");
        dataItem.setCategoryName("Cooking");
        arSubCategory = new ArrayList<>();
        for(int k = 1; k < 6; k++) {

            SubCategoryItem subCategoryItem = new SubCategoryItem();
            subCategoryItem.setCategoryId(String.valueOf(k));
            subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
            subCategoryItem.setSubCategoryName("Cooking: "+k);
            arSubCategory.add(subCategoryItem);
        }

        dataItem.setSubCategory(arSubCategory);
        arCategory.add(dataItem);

        Log.d("TAG", "setupReferences: "+arCategory.size());

        for(DataItem data : arCategory){
    //                        Log.i("Item id",item.id);
            ArrayList<HashMap<String, String>> childArrayList =new ArrayList<HashMap<String, String>>();
            HashMap<String, String> mapParent = new HashMap<String, String>();

            mapParent.put(ConstantManager.Parameter.CATEGORY_ID,data.getCategoryId());
            mapParent.put(ConstantManager.Parameter.CATEGORY_NAME,data.getCategoryName());

            int countIsChecked = 0;
            for(SubCategoryItem subCategoryItem : data.getSubCategory()) {

                HashMap<String, String> mapChild = new HashMap<String, String>();
                mapChild.put(ConstantManager.Parameter.SUB_ID,subCategoryItem.getSubId());
                mapChild.put(ConstantManager.Parameter.SUB_CATEGORY_NAME,subCategoryItem.getSubCategoryName());
                mapChild.put(ConstantManager.Parameter.CATEGORY_ID,subCategoryItem.getCategoryId());
                mapChild.put(ConstantManager.Parameter.IS_CHECKED,subCategoryItem.getIsChecked());

                if(subCategoryItem.getIsChecked().equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE)) {

                    countIsChecked++;
                }
                childArrayList.add(mapChild);
            }

            if(countIsChecked == data.getSubCategory().size()) {

                data.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_TRUE);
            }else {
                data.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
            }

            mapParent.put(ConstantManager.Parameter.IS_CHECKED,data.getIsChecked());
            childItems.add(childArrayList);
            parentItems.add(mapParent);

        }

        ConstantManager.parentItems = parentItems;
        ConstantManager.childItems = childItems;

        myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(this,parentItems,childItems,false);
        lvCategory.setAdapter(myCategoriesExpandableListAdapter);
    }
}





**** This is my Fragment Activity ****


    public class TabFragment1 extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.tab_fragment_1, container, false);
    }

    }







I'm trying to several days but i can't find how to do...