ListView for android (list)

There are several ways to display the list effect on the android interface:

Method 1: Inherit from ListActivity. The key code for using Listadapter is as follows:

private ListAdapter mListAdapter;private List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);listItems=getListItems();mListAdapter = new ListAdapter(this,listItems);setListAdapter(mListAdapter);}private List<Map<String, Object>> getListItems() {         Map<String, Object> map = new HashMap<String, Object>();         map.put("mytitle","Oracle" );         map.put("myimage", R.drawable.a);         map.put("myimages", R.drawable.rating_5);         listItems.add(map);          map = new HashMap<String, Object>();         map.put("mytitle","Sqlite" );         map.put("myimage", R.drawable.b);         map.put("myimages", R.drawable.rating_5);         listItems.add(map);          map = new HashMap<String, Object>();         map.put("mytitle","MySql" );         map.put("myimage", R.drawable.c);         map.put("myimages", R.drawable.rating_5);         listItems.add(map);            return listItems;}

ListAdapter code:

Package org. anjoy. act; import java. util. list; import java. util. map; import android. app. alertDialog; import android. content. context; import android. content. dialogInterface; import android. view. layoutInflater; import android. view. view; import android. view. view. onClickListener; import android. view. viewGroup; import android. widget. baseAdapter; import android. widget. imageView; import android. widget. textView; public Class ListAdapter extends BaseAdapter {private Context context; // Context path private LayoutInflater inflater; // view container private List <Map <String, Object> listitems; // item information set public class holderView // custom control set {private TextView mytitle; private ImageView myimage; private ImageView myimages;} // construct the DeviceAdapter method public ListAdapter (Context context, list <Map <String, Object> listitems) {this. context = context; this. inflater = L AyoutInflater. from (context); // create a view container this. listitems = listitems;} public int getCount () {// TODO Auto-generated method stubreturn listitems. size ();} public Object getItem (int arg0) {// TODO Auto-generated method stubreturn listitems. get (arg0);} public long getItemId (int arg0) {// TODO Auto-generated method stubreturn arg0;} public View getView (int position, View convertView, ViewGroup parent) {// custom view ho LderView mView = null; if (convertView = null) {mView = new holderView (); // obtain the listitem layout file convertView = inflater. inflate (R. layout. main, null); // gets the control object mView. mytitle = (TextView) convertView. findViewById (R. id. mytitle); mView. myimage = (ImageView) convertView. findViewById (R. id. myimage); mView. myimages = (ImageView) convertView. findViewById (R. id. myimageview); // set the control object to convertview in the convertView Gallery. setTag (mView);} else {mView = (HolderView) convertView. getTag ();} // set the value of mView on the item control. mytitle. setText (String) listitems. get (position ). get ("mytitle"); mView. myimage. setBackgroundResource (Integer) listitems. get (position ). get ("myimage"); mView. myimages. setBackgroundResource (Integer) listitems. get (position ). get ("myimages"); mView. myimage. setOnClickListener (new OnClickListener () {public void onClick (View v) {// TODO Auto-generat Ed method stubnew AlertDialog. Builder (context). setIcon (R. drawable. alert). setTitle ("tip"). setMessage ("Please take a look! "). SetPositiveButton (" OK ", null). show () ;}}); return convertView ;}}

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3. Method 2: The activity inherits the Listview and uses SimpleAdapter and the layout file.

Key code:

@ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); SimpleAdapter adapter = new SimpleAdapter (this, getData (), R. layout. main, new String [] {"mytitle", "myimageview", "myimage"}, new int [] {R. id. mytitle, R. id. myimageview, R. id. myimage}); setListAdapter (adapter);} private List <Map <String, Object> getData () {List <Map <String, object> list = new ArrayList <Map <String, Object> (); Map <String, Object> map = new HashMap <String, Object> (); map. put ("mytitle", "IOS textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. a); list. add (map); map = new HashMap <String, Object> (); map. put ("mytitle", "Android textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. b); list. add (map); map = new HashMap <String, Object> (); map. put ("mytitle", "java textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. c); list. add (map); return list ;}

Above

2. Method 3: Create a ListView object in activity and use ListAdapter

@ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); SimpleAdapter adapter = new SimpleAdapter (this, getData (), R. layout. main, new String [] {"mytitle", "myimageview", "myimage"}, new int [] {R. id. mytitle, R. id. myimageview, R. id. myimage}); setListAdapter (adapter);} private List <Map <String, Object> getData () {List <Map <String, object> list = new ArrayList <Map <String, Object> (); Map <String, Object> map = new HashMap <String, Object> (); map. put ("mytitle", "IOS textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. a); list. add (map); map = new HashMap <String, Object> (); map. put ("mytitle", "Android textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. b); list. add (map); map = new HashMap <String, Object> (); map. put ("mytitle", "java textbook"); map. put ("myimageview", R. drawable. rating_5); map. put ("myimage", R. drawable. c); list. add (map); return list ;}

As follows: