高級控件 上（三）
7.ListView事件接口
setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener) 選項選中時觸發
setOnItemClickListener(AdapterView.OnItemClickListener listener) 選項單擊時觸發
setOnItemLongClickListener(AdaoterView.OnItemLongClickListener.listener) 選項長按時觸發
lv1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
Map<String,Object> dateMap=(Map<String, Object>) adapter.getItem(position);
String value=(String) dateMap.get("txt");
Log.i("aa", value);
}
});
8.ListActivity的使用
String [] date=getResources().getStringArray(R.array.city);
ArrayAdapter<String> ada=new ArrayAdapter<String>(
this
,android.R.layout.simple_list_item_multiple_choice
, date);
//設置adapter
setListAdapter(ada);
//設置ListVIew的選擇行為：復選
ListView lv=getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
9.網格列表GridView
gv=(GridView) findViewById(R.id.gv);
List<Map<String, Object>> date=
new ArrayList<Map<String,Object>>();
//獲得所有圖片
Field[] fs=R.drawable.class.getDeclaredFields();
for(Field field:fs){
Map<String, Object>maps=new HashMap<String, Object>();
try {
int id=field.getInt(R.drawable.class);
maps.put("png", id);
date.add(maps);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
adapter=new SimpleAdapter(this,
date, R.layout.gridlist_item,
new String[]{"png"},
new int[]{R.id.iv99});
gv.setAdapter(adapter);
gv.setOnItemClickListener(new ItemClickImpl());
}
public class ItemClickImpl implements OnItemClickListener{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
ImageView iv=new ImageView(GridViewImpl.this);
iv.setScaleType(ScaleType.CENTER);
iv.setLayoutParams(
new LinearLayout.LayoutParams
(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
Map<String, Integer> map=(Map<String, Integer>) adapter.getItem(position);
iv.setImageResource(map.get("png"));
Dialog d=new AlertDialog.Builder(GridViewImpl.this)
.setTitle("顯示圖片")
.setView(iv)
.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.create();
d.show();
}
高級控件 上（三）