Spinner的使用(一项内容)

spinner_item1.xml

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<?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">     <TextView         android:id="@+id/txt_name"         android:layout_width="match_parent"         android:layout_height="30dp"         android:layout_marginLeft="10dp"         android:gravity="center_vertical"         android:textSize="16sp" /> </LinearLayout>

AdapterSpinner1.java

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public class AdapterSpinner1 extends BaseAdapter {       private Context mContext;     private List<String> mList;       public AdapterSpinner1(Context pContext, List<String> pList){         this.mContext = pContext;         this.mList = pList;     }     @Override     public int getCount() {         return mList.size();     }       @Override     public Object getItem(int position) {         return mList.get(position);     }       @Override     public long getItemId(int position) {         return position;     }       @Override     public View getView(int position, View convertView, ViewGroup parent) {         LayoutInflater inflater = LayoutInflater.from(mContext);         convertView = inflater.inflate(R.layout.spinner_item1, null);         if(convertView != null)         {             TextView txt_name = (TextView)convertView.findViewById(R.id.txt_name);             txt_name.setText(mList.get(position));         }         return convertView;     } }

Activity中：

１. 定义变量

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private Spinner mSpinnerZT; private ArrayList<String> listZT; private AdapterSpinner1 adpapter_ZT;

2. 变量的初始化

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mSpinnerZT = (Spinner) findViewById(R.id.spinner_zt);   listZT = new ArrayList<String>(); adpapter_ZT = new AdapterSpinner1(this, listZT); mSpinnerZT.setAdapter(adpapter_ZT);

3. 内容的动态改变

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listZT.clear();  for (int i = 0; i < jsonArray.length(); i++) {     JSONObject jsonData = jsonArray.getJSONObject(i);     listZT.add(jsonData.getString("NAME")); } adpapter_ZT.notifyDataSetChanged();

４. 取当前的选项

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1	final String sZT = listZT.get(mSpinnerZT.getSelectedItemPosition());