public class MainActivity extends Activity
{
private ListView mListView;
private TextView tv1;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (ListView) findViewById(R.id.listInfo);
tv1 = (TextView) findViewById(R.id.list_title);
//初始化資料
List<Content> list = new ArrayList<Content>();
for (int i = 0; i < 10; i++) {
Content m;
if (i < 3)
m = new Content("A", "啊");
else if (i < 6)
m = new Content("F", "方");
else
m = new Content("D", "東");
list.add(m);
}
// 實體化自定義內容適配類
MyAdapter adapter = new MyAdapter(this, list,tv1);
// 為listView設定適配
mListView.setAdapter(adapter);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}
}
public class MyAdapter extends BaseAdapter {
private List<Content> list = null;
private Context mContext;
TextView tv;
public MyAdapter(Context mContext, List<Content> list,TextView textview) {
this.mContext = mContext;
this.list = list;
tv=textview;
}
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(mContext,(String)getItem(position), Toast.LENGTH_SHORT).show();
tv.setText((String)getItem(position));
}
public int getCount() {
return this.list.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup arg2) {
final String item=(String)getItem(position);
ViewHolder viewHolder = null;
if (view == null) {
viewHolder = new ViewHolder();
view = LayoutInflater.from(mContext).inflate(R.layout.item, null);
viewHolder.tvTitle = (TextView) view.findViewById(R.id.title);
viewHolder.tvLetter = (TextView) view.findViewById(R.id.catalog);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
final Content mContent = list.get(position);
if (position == 0) {
viewHolder.tvLetter.setVisibility(View.VISIBLE);
viewHolder.tvLetter.setText(mContent.getLetter());
} else {
String lastCatalog = list.get(position - 1).getLetter();
if (mContent.getLetter().equals(lastCatalog)) {
viewHolder.tvLetter.setVisibility(View.GONE);
} else {
viewHolder.tvLetter.setVisibility(View.VISIBLE);
viewHolder.tvLetter.setText(mContent.getLetter());
}
}
viewHolder.tvTitle.setText(this.list.get(position).getName());
return view;
}
final static class ViewHolder {
TextView tvTitle;
TextView tvLetter;
}
public Object[] getSections() {
// TODO Auto-generated method stub
return null;
}
public int getSectionForPosition(int position) {
return 0;
}
public int getPositionForSection(int section) {
Content mContent;
String l;
if (section == '!') {
return 0;
} else {
for (int i = 0; i < getCount(); i++) {
mContent = (Content) list.get(i);
l = mContent.getLetter();
char firstChar = l.toUpperCase().charAt(0);
if (firstChar == section) {
return i + 1;
}
}
}
mContent = null;
l = null;
return -1;
}
}
uj5u.com熱心網友回復：
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// 這里沒寫東西 ？
}
});
uj5u.com熱心網友回復：
你setOnItemClickListener不是空的嗎轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/257934.html
標籤：Android