first shot for improved expandable lists

app/src/main/java/com/zeapo/pwdstore/PasswordFragment.java

@@ -10,6 +10,7 @@ import android.view.ViewGroup;
 import android.widget.AbsListView;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
+import android.widget.ExpandableListView;
 import android.widget.ListAdapter;
 import android.widget.ListView;
 
@@ -27,14 +28,14 @@ import java.util.List;
  * with a GridView.
  * <p />
  */
-public class PasswordFragment extends Fragment implements AbsListView.OnItemClickListener {
+public class PasswordFragment extends Fragment implements ExpandableListView.OnGroupClickListener {
 
     private OnFragmentInteractionListener mListener;
 
     /**
      * The fragment's ListView/GridView.
      */
-    private ListView mListView;
+    private ExpandableListView mListView;
 
     /**
      * The Adapter which will be used to populate the ListView/GridView with
@@ -62,11 +63,11 @@ public class PasswordFragment extends Fragment implements AbsListView.OnItemClic
         View view = inflater.inflate(R.layout.fragment_password, container, false);
 
         // Set the adapter
-        mListView = (ListView) view.findViewById(R.id.pass_list);
-        ((AdapterView<ListAdapter>) mListView).setAdapter(mAdapter);
+        mListView = (ExpandableListView) view.findViewById(R.id.pass_list);
+        mListView.setAdapter((android.widget.ExpandableListAdapter) mAdapter);
 
         // Set OnItemClickListener so we can be notified on item clicks
-        mListView.setOnItemClickListener(this);
+        mListView.setOnGroupClickListener(this);
         mListView.setSelectionFromTop(getArguments().getInt("Position"), 0);
 
         return view;
@@ -97,12 +98,22 @@ public class PasswordFragment extends Fragment implements AbsListView.OnItemClic
     }
 
     @Override
-    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-        if (null != mListener) {
-            // Notify the active callbacks interface (the activity, if the
-            // fragment is attached to one) that an item has been selected.
-            mListener.onFragmentInteraction(mAdapter.getItem(position));
+    public boolean onGroupClick(ExpandableListView expandableListView, View view, int i, long l) {
+        if( ((PasswordItem) mAdapter.getGroup(i)).getType() == PasswordItem.TYPE_CATEGORY ){
+            if (null != mListener) {
+    //            Notify the active callbacks interface (the activity, if the
+    //            fragment is attached to one) that an item has been selected.
+                mListener.onFragmentInteraction(mAdapter.getItem(i));
+            }
+        } else {
+            if (expandableListView.isGroupExpanded(i)) {
+                expandableListView.collapseGroup(i);
+            } else {
+                expandableListView.expandGroup(i);
+            }
         }
+
+        return true;
     }
 
     public interface OnFragmentInteractionListener {

app/src/main/java/com/zeapo/pwdstore/utils/PasswordAdapter.java

@@ -1,18 +1,21 @@
 package com.zeapo.pwdstore.utils;
 
 import android.content.Context;
+import android.database.DataSetObserver;
 import android.graphics.Typeface;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
+import android.widget.ExpandableListAdapter;
 import android.widget.TextView;
 
 import com.zeapo.pwdstore.R;
 
 import java.util.ArrayList;
 
-public class PasswordAdapter extends ArrayAdapter<PasswordItem> {
+public class PasswordAdapter extends ArrayAdapter<PasswordItem>  implements  ExpandableListAdapter{
     private final Context context;
     private final ArrayList<PasswordItem> values;
 
@@ -28,9 +31,57 @@ public class PasswordAdapter extends ArrayAdapter<PasswordItem> {
     }
 
     @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
+    public void registerDataSetObserver(DataSetObserver dataSetObserver) {
+
+    }
+
+    @Override
+    public void unregisterDataSetObserver(DataSetObserver dataSetObserver) {
+
+    }
+
+    @Override
+    public int getGroupCount() {
+        return values.size();
+    }
+
+    @Override
+    public int getChildrenCount(int i) {
+        if (values.get(i).getType() == PasswordItem.TYPE_CATEGORY)
+            return 0;
+        else
+            return 1;
+    }
+
+    @Override
+    public Object getGroup(int i) {
+        return values.get(i);
+    }
+
+    @Override
+    public Object getChild(int i, int i2) {
+        return null;
+    }
+
+    @Override
+    public long getGroupId(int i) {
+        return 0;
+    }
+
+    @Override
+    public long getChildId(int i, int i2) {
+        return 0;
+    }
+
+    @Override
+    public boolean hasStableIds() {
+        return false;
+    }
+
+    @Override
+    public View getGroupView(int i, boolean b, View convertView, ViewGroup viewGroup) {
         View rowView = convertView;
-        PasswordItem pass = values.get(position);
+        PasswordItem pass = values.get(i);
 
         // reuse for performance, holder pattern!
         if (rowView == null) {
@@ -60,4 +111,51 @@ public class PasswordAdapter extends ArrayAdapter<PasswordItem> {
 
         return rowView;
     }
+
+    @Override
+    public View getChildView(int i, int i2, boolean b, View view, ViewGroup viewGroup) {
+        PasswordItem pass = values.get(i);
+
+        LayoutInflater inflater = (LayoutInflater) context
+                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        view = inflater.inflate(R.layout.child_row_layout, null);
+        Log.i("ADAPTER", "Child clicked");
+
+        return view;
+    }
+
+    @Override
+    public boolean isChildSelectable(int i, int i2) {
+        return false;
+    }
+
+    @Override
+    public boolean areAllItemsEnabled() {
+        return false;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return false;
+    }
+
+    @Override
+    public void onGroupExpanded(int i) {
+
+    }
+
+    @Override
+    public void onGroupCollapsed(int i) {
+
+    }
+
+    @Override
+    public long getCombinedChildId(long l, long l2) {
+        return 0;
+    }
+
+    @Override
+    public long getCombinedGroupId(long l) {
+        return 0;
+    }
 }

app/src/main/res/layout/child_row_layout.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+        <ImageButton
+            android:id="@+id/crypto_delete_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ico_del"
+            android:background="@drawable/red_rectangle"
+            android:layout_gravity="center_vertical"
+            android:onClick="handleClick"
+            android:layout_column="1"
+            android:layout_row="0"/>
+
+        <ImageButton
+            android:id="@+id/crypto_show_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ico_key"
+            android:background="@drawable/blue_rectangle"
+            android:layout_gravity="center_vertical"
+            android:layout_marginLeft="8dp"
+            android:onClick="handleClick"
+            android:layout_column="2"
+            android:layout_row="0"/>
+
+</GridLayout>

app/src/main/res/layout/fragment_password_list.xml

@@ -5,11 +5,12 @@
     android:layout_height="match_parent"
     tools:context="com.zeapo.pwdstore.PasswordFragment">
 
-    <ListView
+    <ExpandableListView
         android:id="@+id/pass_list"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:dividerHeight="@dimen/activity_vertical_margin"
-        android:divider="@android:color/transparent"/>
+        android:divider="@android:color/transparent"
+        android:groupIndicator="@android:drawable/screen_background_light_transparent"/>
 
 </FrameLayout>