I have the following source code, this is an Expandable list it has a child list, which has some view like Image button, Image button, i want to do event handling on these views. please
provide me source code for the following.
public class ExpList extends ExpandableListActivity {
ImageView imageView, heart;
View view;
ArrayList count = new ArrayList();
//private Context context;
ExpandableListAdapterDemo madapter;
static final String shades[][] = {
// Shades of grey
{ “Episode1”, “Episode1”, “Episode1”, “Episode1”, “Episode1” },
// Shades of blue
{ “Episode2”, “Episode2”, “Episode2”, “Episode2”, “Episode2”,
“Episode2” },
{ “Episode3”, “Episode3”, “Episode3” },
// Shades of red
{ “Episode4”, “Episode4”, “Episode4”, “Episode4” },
{ “Episode5”, “Episode5”, “Episode5”, “Episode5” },
{ “Episode6”, “Episode6”, “Episode6”, “Episode6”, “Episode6”,
“Episode6” },
{ “Episode7”, “Episode7”, “Episode7”, “Episode7”, “Episode7”,
“Episode7” },
{ “Episode8”, “Episode8”, “Episode8”, “Episode8”, “Episode8” },
{ “Episode9”, “Episode9”, “Episode9”, “Episode9”, “Episode9”,
“Episode9”, “Episode9” },
{ “Episode10”, “Episode10”, “Episode10”, “Episode10”, “Episode10”,
“Episode10”, “Episode10”, “Episode10” }
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
Log.i("ARRy lentgh_____________", " " + shades.length);
for (int n = 0; n < shades.length; n++) {
count.add(Integer.toString(shades[n].length));
Log.i("item y lentgh_____________", " " + shades[n].length);
}
for (int n = 0; n < count.size(); n++) {
Log.i("List Elements are_____________", " " + count.get(n));
// count.add(Integer.toString(shades[n].length));
}
madapter= new ExpandableListAdapterDemo(this,createGroupList(),createChildList());
SimpleExpandableListAdapter expListAdapter = new SimpleExpandableListAdapter(
this, createGroupList(), // groupData describes the first-level
// entries
R.layout.parent_row, // Layout for the first-level entries
new String[] { "count" }, // Key in the groupData maps to
// display
new int[] { R.id.episode_count }, // Data under "colorName" key
// goes into this TextView
createChildList(), // childData describes second-level entries
R.layout.child_row, // Layout for second-level entries
new String[] { "shadeName" }, // Keys in childData maps to
// display
new int[] { R.id.childname } // Data under the keys above go
// into these TextViews
);
setListAdapter(expListAdapter);
final ExpandableListView exlv = this.getExpandableListView();
Log.i("exlv.getWidth():widthhhhhhhhh", "" + exlv.getWidth() + 50);
exlv.setIndicatorBounds(exlv.getWidth() + 30, exlv.getWidth() + 520);
exlv.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int arg0) {
// TODO Auto-generated method stub
Log.i("Group Expand id is ", " " + exlv.getChildAt(arg0)+"Count is "+exlv.getChildCount()
+ " ");
LinearLayout linearLayout= (LinearLayout) exlv.getChildAt(arg0);
//LinearLayout linearLayout= (LinearLayout)findViewById(R.layout.child_row);
Log.i("Linear layout is ", " " + linearLayout
+ " ");
imageView= (ImageView)linearLayout.findViewById(R.id.imageView2);
Log.i("Image view id is ", " " + imageView
+ " ");
}
});
exlv.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView arg0, View arg1,
int arg2, long arg3) {
LinearLayout linearLayout= (LinearLayout) arg0.getChildAt(arg2);
imageView= (ImageView)linearLayout.findViewById(R.id.imageView2);
Log.i("Image view id is ", " " + imageView
+ " ");
Log.i("View is", ";;;;;;;;;;;; " + arg1.findViewById(R.id.imageView2)
+ " layout "+linearLayout+"image id on group "+imageView);
Toast.makeText(getBaseContext(), "Group clicked ",
Toast.LENGTH_SHORT).show();
return false;
}
});
exlv.setOnChildClickListener(new OnChildClickListener() {
public boolean onChildClick(ExpandableListView arg0, View arg1,
int arg2, int arg3, long arg4) {
Toast.makeText(ExpList.this,
"Child ItemClicked " + arg2 + " " + arg3,
Toast.LENGTH_SHORT).show();
imageView = (ImageView)arg1.findViewById(R.id.imageView2);
Log.i("ImageView Value "," hi "+imageView.toString());
imageView.setOnClickListener(new OnClickListener() {
@Override public void onClick(View arg0) { // TODO Auto-generated
Intent intent = new Intent(ExpList.this,DemoActivity.class);
startActivity(intent);
} });
// TODO Auto-generated method stub
return false;
}
});
/*
* imageView.setOnClickListener(new OnClickListener() {
*
* @Override public void onClick(View arg0) { // TODO Auto-generated
* method stub Intent intent = new
* Intent(ExpList.this,DemoActivity.class); startActivity(intent); } });
*/
for (int n = 0; n < count.size(); n++) {
Log.i("Values of episode is ", " " + count.get(n));
}
}
/**
* Creates the group list out of the colors[] array according to the
* structure required by SimpleExpandableListAdapter. The resulting List
* contains Maps. Each Map contains one entry with key "colorName" and value
* of an entry in the colors[] array.
*/
private List createGroupList() {
ArrayList result = new ArrayList();
Log.i("size of count is", " " + count.size());
for (int i = 0; i < shades.length; i++) {
HashMap m = new HashMap();
m.put("count", count.get(i));
result.add(m);
}
return result;
}
/**
* Creates the child list out of the shades[] array according to the
* structure required by SimpleExpandableListAdapter. The resulting List
* contains one list for each group. Each such second-level group contains
* Maps. Each such Map contains two keys: "shadeName" is the name of the
* shade and "rgb" is the RGB value for the shade.
*/
private List createChildList() {
ArrayList result = new ArrayList();
Log.i("two dim Array Size is ", " Size is " + shades.length);
for (int i = 0; i < shades.length; ++i) {
// Second-level lists
ArrayList secList = new ArrayList();
for (int j = 0; j < shades[i].length; j++) {
HashMap child = new HashMap();
child.put("shadeName", shades[i][j]);
secList.add(child);
}
result.add(secList);
}
return result;
}
public class ExpandableListAdapterDemo extends BaseExpandableListAdapter {
@Override
public boolean areAllItemsEnabled() {
return true;
}
private Context context;
private ArrayList<String> groups;
private ArrayList<ArrayList> children;
public ExpandableListAdapterDemo(Context context, List groups, List chiildren)
{
this.context = context;
this.groups = (ArrayList<String>) groups;
this.children = (ArrayList<ArrayList>) chiildren;
}
/**
* A general add method, that allows you to add a Vehicle to this list
*
* Depending on if the category opf the vehicle is present or not, the
* corresponding item will either be added to an existing group if it
* exists, else the group will be created and then the item will be
* added
*
* @param vehicle
*/
@Override
public Object getChild(int groupPosition, int childPosition) {
return children.get(groupPosition).get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
// Return a child view. You can load your custom layout here.
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ImageView tv = (ImageView) convertView
.findViewById(R.id.imageView2);
tv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Log.i("hiiiiiiiiiiiiiiiii","image clicked");
Intent intent = new Intent(ExpList.this, DemoActivity.class);
startActivity(intent);
}
});
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return children.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
@Override
public int getGroupCount() {
return groups.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
// Return a group view. You can load your custom layout here.
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// String group = (String) getGroup(groupPosition);
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int arg0, int arg1) {
return true;
}
}
}
I have a solution for you, it’s so simple.
Let’s use two dimensions array to give your adapter data to show in the views, so when you want to access the data in one child to change something(maybe string of textview, image resource of Imageview, etc), you just need to remove the element of the two dimensions array which has the same position as in your expandablelistview, then add a new element with changed data at that position too. Then call adapter.notifyDataSetChanged();
It’s a bit hard to understand, so see the code, it should look like: