I have created a custom list view adapter and items for the list view is stored at String.xml. When I run the app I only shows a blank activity.
Please help me to fix this issue.
This is my custom adapter java class.
public class UserAdapter extends ArrayAdapter<User> {
public UserAdapter(Context context, ArrayList<User> users, String[] number) {
super(context, 0, users);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
User user = getItem(position);
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.listview_singlerow, parent, false);
}
TextView tvName = (TextView) convertView.findViewById(R.id.org_name);
TextView tvNum = (TextView) convertView.findViewById(R.id.cn_num);
// Populate the data into the template view using the data object
tvName.setText(user.company_name);
tvNum.setText(user.contact_num);
return convertView;
}}
List View model class.
public class User {
public String company_name;
public Integer contact_num;
public User(String company_name, Integer contact_num) {
this.company_name = company_name;
this.contact_num = contact_num;
}}
Main Activity class where I attach adapter to the view.
public class activity_one extends Activity {
String[] number;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity1);
number = getResources().getStringArray(R.array.dummy_data);
ArrayList<User> arrayOfUsers = new ArrayList<User>();
UserAdapter adapter = new UserAdapter(this, arrayOfUsers,number);
ListView listView = (ListView) findViewById(R.id.listView2);
listView.setAdapter(adapter);
}}
Since i am not 100% sure on what you want to do, ill show you a piece of my code and you can deduce from that what you need. My DrawerListAdapter
is an custom ListView
adapter, and every item on that list consists of 3 objects - a String
name, String
imageurl, String
description.
public class DrawerListAdapter extends ArrayAdapter<String> {
private final static int settingsCount = 4; // can ignore this
private Activity context;
// Next 3 lines: All data required for this adapter
private static ArrayList<String> itemname = null;
private static ArrayList<String> imgid;
private static ArrayList<String> itemDescription;
public DrawerListAdapter(Activity context, ArrayList<String> itemname, ArrayList<String> itemDescription, ArrayList<String> imgid) {
// R.layout.drawer_list_item is a layout that represents ONE item
// (not 100% sure, but i think the super class inflates this view itemname.size() times)
super(context, R.layout.drawer_list_item, itemname);
this.context=context;
// saving the required data
DrawerListAdapter.itemDescription = itemDescription;
DrawerListAdapter.itemname=itemname;
DrawerListAdapter.imgid=imgid;
}
@Override
public View getView(int position,View view,ViewGroup parent) {
LayoutInflater inflater=context.getLayoutInflater();
View rowView=inflater.inflate(R.layout.drawer_list_item, null,true);
// the views that are present in R.layout.drawer_list_item
TextView txtTitle = (TextView) rowView.findViewById(R.id.tvName);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
TextView extratxt = (TextView) rowView.findViewById(R.id.tvDescription);
txtTitle.setText(itemname.get(position));
extratxt.setText(itemDescription.get(position));
// setting the image here of the list item here
if (position < settingsCount) {
imageView.setImageResource(Integer.parseInt(imgid.get(position)));
} else {
Glide.with(context).load(imgid.get(position)).into(imageView);
}
return rowView;
};
// need to override the getCount. this function just returns the amount of items in your list
@Override
public int getCount(){
if (itemname != null)
return itemname.size();
return 0;
}
This is initialized by:
private void init() {
mDrawerList = (ListView) findViewById(R.id.left_drawer);
if (adapter == null) {
ArrayList<String> itemname = new ArrayList<String>();
itemname.add("item1");
itemname.add("item2");
itemname.add("item3");
itemname.add("item4");
ArrayList<String> imgid = new ArrayList<String>();
imgid.add(R.drawable.pic1 + "");
imgid.add(R.drawable.pic2 + "");
imgid.add(R.drawable.pic4 + "");
imgid.add(R.drawable.pic3 + "");
ArrayList<String> itemDescription = new ArrayList<String>();
itemDescription.add("desc1");
itemDescription.add("desc2");
itemDescription.add("desc3");
itemDescription.add("desc4");
adapter=new DrawerListAdapter(this, itemname, itemDescription, imgid);
setOnItemClickListener(); // sets onClick for each item on the list
}
mDrawerList.setAdapter(adapter);
}
and the drawer_list_item.xml just in case you are intrested:
<?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="horizontal" >
<ImageView
android:id="@+id/icon"
android:layout_width="60dp"
android:layout_height="60dp"
android:padding="5dp" />
<LinearLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="5dp"
android:padding="2dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#429bd9" />
<TextView
android:id="@+id/tvDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:maxLines="2"
android:textColor="#79e5a4" />
</LinearLayout>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.