Tuesday 6 December 2016

Three Level Exapandable ListView In Android with Two level Indicators

Java:
package zaihuishou.com.expandablerecyclerview;

import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

import zaihuishou.com.expandablerecyclerview.loader.listener.ServiceResponseListener;
import zaihuishou.com.expandablerecyclerview.loader.manager.ServiceManager;
import zaihuishou.com.expandablerecyclerview.navcategory.FirstLevelCategory;
import zaihuishou.com.expandablerecyclerview.navcategory.NavigationGategoryBaseResponse;
import zaihuishou.com.expandablerecyclerview.navcategory.SecondLevelCategory;

public class TestActivity extends AppCompatActivity {
    private ExpandableListView expandableListView;
    private Context context;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
        context = this;
        expandableListView = (ExpandableListView) findViewById(R.id.mainList);
        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int width = metrics.widthPixels;
        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
            expandableListView.setIndicatorBounds(width - GetPixelFromDips(50), width - GetPixelFromDips(10));
        } else {
            expandableListView.setIndicatorBoundsRelative(width - GetPixelFromDips(50), width - GetPixelFromDips(10));
        }
        addNavigationList();
    }

    public int GetPixelFromDips(float pixels) {
        // Get the screen's density scale        final float scale = getResources().getDisplayMetrics().density;
        // Convert the dps to pixels, based on density scale        return (int) ((scale * pixels + 0.5f) - 5);
    }

    public void addNavigationList() {
        ServiceManager.navigationList(getApplicationContext(), new ServiceResponseListener<NavigationGategoryBaseResponse>() {
                    @Override                    public void onSuccess(NavigationGategoryBaseResponse response) {
                        expandableListView.setAdapter(new TestActivity.ParentLevel(context, response.getMainCategories()));
                    }

                    @Override                    public void onFailure(Throwable throwable, String errorResponse) {

                    }
                }
        );
    }


    public class ParentLevel extends BaseExpandableListAdapter {

        private Context context;
        private List<FirstLevelCategory> firstLevelCategories;

        public ParentLevel(Context context, List<FirstLevelCategory> firstLevelCategoryList) {
            this.context = context;
            this.firstLevelCategories = firstLevelCategoryList;
        }

        @Override        public Object getChild(int arg0, int arg1) {
            return arg1;
        }

        @Override        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
        @Override        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            TestActivity.SecondLevelExpandableListView secondLevelELV = new TestActivity.SecondLevelExpandableListView(TestActivity.this);
            secondLevelELV.setAdapter(new TestActivity.SecondLevelAdapter(context, firstLevelCategories.get(groupPosition).getSubGrouphs().get(childPosition)));
            secondLevelELV.setGroupIndicator(getResources().getDrawable(R.drawable.settings_selector));
            DisplayMetrics metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);
            int width = metrics.widthPixels;
            if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
                secondLevelELV.setIndicatorBounds(width - GetPixelFromDips(50), width - GetPixelFromDips(10));
            } else {
                secondLevelELV.setIndicatorBoundsRelative(width - GetPixelFromDips(50), width - GetPixelFromDips(10));
            }
            return secondLevelELV;
        }

        @Override        public int getChildrenCount(int groupPosition) {
            return firstLevelCategories.get(groupPosition).getSubGrouphs().size();
        }

        @Override        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override        public int getGroupCount() {
            return firstLevelCategories.size();
        }

        @Override        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
        @Override        public View getGroupView(int groupPosition, final boolean isExpanded, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_first, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                final ImageView icon = (ImageView) convertView.findViewById(R.id.icon);

                String name = firstLevelCategories.get(groupPosition).getCategoryname();
                if (name.equals(context.getString(R.string.Fancy))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.fancy));
                } else if (name.equals(context.getString(R.string.Women))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.women));
                } else if (name.equals(context.getString(R.string.Office))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.stationary));
                } else if (name.equals(context.getString(R.string.BooksMore))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.books));
                } else if (name.equals(context.getString(R.string.Men))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.businessman));
                } else if (name.equals(context.getString(R.string.DailyNeeds))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.calendar));
                } else if (name.equals(context.getString(R.string.Garments))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.garments));
                } else if (name.equals(context.getString(R.string.BabyKids))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.babykids));
                } else if (name.equals(context.getString(R.string.Fashion))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.fasion));
                } else if (name.equals(context.getString(R.string.Electronics))) {
                    icon.setBackground(context.getResources().getDrawable(R.drawable.elctronics));
                }
                text.setText(name);
            }
            return convertView;
        }

        @Override        public boolean hasStableIds() {
            return true;
        }

        @Override        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }

    public class SecondLevelExpandableListView extends ExpandableListView {


        public SecondLevelExpandableListView(Context context) {
            super(context);
        }

        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    public class SecondLevelAdapter extends BaseExpandableListAdapter {

        private Context context;
        private SecondLevelCategory secondLevelCategories;

        public SecondLevelAdapter(Context context, SecondLevelCategory secondLevelCategories) {
            this.context = context;
            this.secondLevelCategories = secondLevelCategories;
        }

        @Override        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override        public int getGroupCount() {
            return 1;
        }

        @Override        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_third, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText(secondLevelCategories.getSubcategoryname());
            }
            return convertView;
        }

        @Override        public Object getChild(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_second, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText(secondLevelCategories.getThirdLevelCategoryList().get(childPosition).getLowersubcategoryname());
            }
            return convertView;
        }

        @Override        public int getChildrenCount(int groupPosition) {
            return secondLevelCategories.getThirdLevelCategoryList().size();
        }

        @Override        public boolean hasStableIds() {
            return true;
        }

        @Override        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }
}

main.Xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/activity_test"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="zaihuishou.com.expandablerecyclerview.TestActivity"><ExpandableListViewandroid:id="@+id/mainList"android:layout_width="match_parent"android:layout_height="match_parent"android:background="#ffffff"android:groupIndicator="@drawable/settings_selector"android:transcriptMode="alwaysScroll"></ExpandableListView></RelativeLayout>
rowfirst.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="100dp"android:orientation="horizontal"android:padding="10dp"><ImageViewandroid:id="@+id/icon"android:layout_width="25dp"android:layout_height="25dp"android:layout_alignParentLeft="true" /><TextViewandroid:id="@+id/eventsListEventRowText"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_toLeftOf="@+id/plus"android:layout_toRightOf="@+id/icon"android:textColor="@android:color/background_dark"android:textSize="15sp" /></LinearLayout>
rowsecond.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:padding="10dp"><TextViewandroid:id="@+id/eventsListEventRowText"android:layout_width="match_parent"android:layout_height="wrap_content"android:paddingLeft="20dp" /></LinearLayout>

rowthird.xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:padding="10dp"><TextViewandroid:id="@+id/eventsListEventRowText"android:layout_width="match_parent"android:layout_height="wrap_content" /></LinearLayout>


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