One of the four implementation methods for the Android custom "image + text" control -------- Gallery principle (source code download is provided)

There are four ways to implement the composite controls of image and text. The first method is to use Gallery. Part 1: Create a layout file to add text to images. Name: pic_text.xml, content: [html] <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "fill_parent" android: layout_height = "fill_parent" android: orientation = "vertical"> <ImageView android: id = "@ + id/image" android: layout_gravity = "center_horizontal" android: layout_width = "80dp" android: layout_height = "80dp"/> <TextView android: id = "@ + id/text" android: layout_width = "wrap _ Content "android: layout_height =" wrap_content "android: layout_gravity =" center_horizontal "android: textSize =" 14dp "android: gravity =" center "android: textColor = "# ffffffff"/> </LinearLayout> Part 2: Layout file of the entire program, that is, a gallery: [html] <? Xml version = "1.0" encoding = "UTF-8"?> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "fill_parent" android: layout_height = "fill_parent" android: orientation = "vertical"> <TextView android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: text = "@ string/hello"/> <Gallery android: id = "@ + id/myGallery" android: layout_width = "fill_parent" android: layout_height = "wrap_content "/> </LinearLayout> Part 3: Main Program: [java] package yan. guoqi. testgallery; import android. app. activity; import android. content. context; import android. OS. bundle; import android. view. view; import android. view. viewGroup; import android. widget. adapterView; import android. widget. adapterView. onItemClickListener; import android. widget. baseAdapter; import android. widget. gallery; import android. widget. imageView; im Port android. widget. textView; import android. widget. toast; public class TestGalleryActivity extends Activity {/** Called when the activity is first created. * // @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); Gallery gallery = (Gallery) findViewById (R. id. myGallery); gallery. setAdapter (new galleryAdapter (this); gallery. s EtOnItemClickListener (new OnItemClickListener () {public void onItemClick (AdapterView <?> Parent, View v, int position, long id) {// TODO Auto-generated method stub Toast. makeText (TestGalleryActivity. this, "" + id + "clicked! ", Toast. LENGTH_SHORT ). show () ;}}); gallery. setSelection (1); gallery. setSpacing (20); gallery. setUnselectedAlpha (1500000f);} public class galleryAdapter extends BaseAdapter {private Integer [] img = {R. drawable. identify, R. drawable. recognize, R. drawable. manage}; private String [] str = {"authentication module", "recognition module", "Management Palm Library"}; private Context mContext; public galleryAdapter (Context c) {mContext = c;} public int getCount () {// TODO Auto-generated method stub return img. length;} public Object getItem (int position) {// TODO Auto-generated method stub return position;} public long getItemId (int position) {// TODO Auto-generated method stub return position;} public View getView (int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stub ViewHolder holder; if (convertView = null) {holder = new ViewHolder (); convertView = View. inflate (mContext, R. layout. pic_text, null); holder. pic = (ImageView) convertView. findViewById (R. id. image); holder. text = (TextView) convertView. findViewById (R. id. text); convertView. setTag (holder);} else {holder = (ViewHolder) convertView. getTag ();} holder. pic. setImageResource (img [position]); holder. text. setText (str [position]); return convertView;} www.2cto.com class ViewHolder {private ImageView pic; private TextView text ;}}} (the figure capture is a little small, ⊙ B Khan):