Agfdhyk

I have made an expandablelistview with child activities, and now I want to implement a searchView with search filter for the children, but I dont know how to do it. I have searched on the internet for a solution but them i tried didn´t work.

I want to be able to search filter after the child such as "Super" and when i click on "Super" it opens the activity.

Can someone help me with this?

Heres my code:

MainActivity:

public class MainActivity extends AppCompatActivity {



ExpandableListView expandableListView;



List<String> langs;

Map<String, List<String>> topics;

ExpandableListAdapter listAdapter;



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);







    expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);

    fillData();



    listAdapter = new MyExListAdapter(this,langs,topics);



    expandableListView.setAdapter(listAdapter);



    expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

        @Override

        public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {







            switch (groupPosition)



            {

                case 0: // Dette er groupPosition (altså Java)





                    switch (childPosition)

                    {

                        case 0:  // Dette er childPosition

                            Super();

                            break;

                        case 1:

                            //do something

                            break;

                    }



                    switch (childPosition)

                    {

                        case 1:

                            Encapsulation();

                            break;

                        case 2:

                            //do something

                            break;

                    }



                    switch (childPosition)

                    {

                        case 2:

                            Methods();

                            break;

                        case 3:

                            //do something

                            break;

                    }



                    break;     //Husk break her for at undgå du åbner for begge parents første child





                case 1: // Dette er groupPosition (altså C)



                    switch (childPosition)

                    {

                        case 0:

                            Procedure();

                            break;

                        case 1:

                            //do something

                            break;

                    }





                    switch (childPosition)

                    {

                        case 1:

                            Pointer();

                            break;

                        case 2:

                            //do something

                            break;

                    }





                    switch (childPosition)

                    {

                        case 2:

                            Array();

                            break;

                        case 3:

                            //do something

                            break;

                    }



                    break;





            }



            return false;



        }



        // Hovedgruppe Java



        private void Super() {



            Intent MyIntent = new Intent(MainActivity.this, Super.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Bruges for at undgå den åbner to af samme activities (flag activity clear top)

            startActivity(MyIntent);

        }



        private void Encapsulation() {



            Intent MyIntent = new Intent(MainActivity.this, Encapsulation.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Bruges for at undgå den åbner to af samme activities (flag activity clear top)

            startActivity(MyIntent);

        }



        private void Methods() {



            Intent MyIntent = new Intent(MainActivity.this, Methods.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            startActivity(MyIntent);

        }







        // Hovedgruppe C



        private void Procedure() {



            Intent MyIntent = new Intent(MainActivity.this, Procedure.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Bruges for at undgå den åbner to af samme activities (flag activity clear top)

            startActivity(MyIntent);

        }



        private void Pointer() {



            Intent MyIntent = new Intent(MainActivity.this, Pointer.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Bruges for at undgå den åbner to af samme activities (flag activity clear top)

            startActivity(MyIntent);

        }



        private void Array() {



            Intent MyIntent = new Intent(MainActivity.this, Array.class);

            MyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            startActivity(MyIntent);

        }





    });

}



public void fillData()

{

    langs = new ArrayList<>();

    topics = new HashMap<>();



    langs.add("Java");

    langs.add("C");



    List<String> java = new ArrayList<>();

    List<String> C = new ArrayList<>();





    // Hovedgruppe java



    java.add("Super");

    java.add("Encapsulation");

    java.add("Methods");



    // Hovedgruppe C



    C.add("Procedure");

    C.add("Pointers");

    C.add("Array");

    C.add("Array");

    C.add("Array");

    C.add("Array");

    C.add("Array");





    topics.put(langs.get(0),java);

    topics.put(langs.get(1),C);

}

}

MyExListAdapter:

public class MyExListAdapter extends BaseExpandableListAdapter

{



Context context;

List<String> langs;

Map<String, List<String>> topics;



public MyExListAdapter(Context context, List<String> langs, Map<String, List<String>> topics) {

    this.context = context;

    this.langs = langs;

    this.topics = topics;

}



@Override

public int getGroupCount() {

    return langs.size();

}



@Override

public int getChildrenCount(int groupPosition) {

    return topics.get(langs.get(groupPosition)).size();

}



@Override

public Object getGroup(int groupPosition) {

    return langs.get(groupPosition);

}



@Override

public Object getChild(int groupPosition, int childPosition) {

    return topics.get(langs.get(groupPosition)).get(childPosition);

}



@Override

public long getGroupId(int groupPosition) {

    return groupPosition;

}



@Override

public long getChildId(int groupPosition, int childPosition) {

    return childPosition;

}



@Override

public boolean hasStableIds() {

    return false;

}



@Override

public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {



    String lang = (String) getGroup(groupPosition);



    if(convertView == null)

    {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

        convertView = inflater.inflate(R.layout.list_parent,null);

    }



    TextView txtParent = (TextView) convertView.findViewById(R.id.txtParent);

    txtParent.setText(lang);



    return convertView;

}



@Override

public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {



    String topic = (String) getChild(groupPosition,childPosition);



    if(convertView == null)

    {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

        convertView = inflater.inflate(R.layout.list_child,null);

    }



    TextView txtChild = (TextView) convertView.findViewById(R.id.txtChild);

    txtChild.setText(topic);



    return convertView;

}



@Override

public boolean isChildSelectable(int groupPosition, int childPosition) {

    return true;

}

}

activity_main.xml:

<RelativeLayout 



    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    tools:context=".MainActivity">



    <ExpandableListView

        android:layout_width="wrap_content"

        android:layout_height="match_parent"

        android:id="@+id/expandableListView"

        android:groupIndicator="@null"

        android:cacheColorHint="#00000000"

        android:listSelector="@android:color/transparent"



        />



</RelativeLayout>