小菜求助 关于listview的问题
我是想要把我从json解析得到的字符串数据 添加到listview里每一个item的textview里。现在遇到了点问题，求助大神。这个问题应该很基础的。。 主要问题是我得到的数据shuzhangyalist 在getdata方法里。。。 谢谢各位了
上代码

public class ShuzhangyaGraph extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.graph_of_shuzhangya);
                ListView listview = (ListView) findViewById(R.id.listView1);
ListAdapter adapter = new MyAdapter(this);
listview.setAdapter(adapter);

getdata();
}

public void getdata() {

try {
HttpClient httpClient = new DefaultHttpClient();
String urlStr = "http://211.83.105.83/test2/MobileHealth/OrdersListAction.aspx?UserID=123";
HttpPost post = new HttpPost(new URI(urlStr));
JSONObject json = new JSONObject();
json.put("UserID", 123);
json.put("UserName", "name1");

post.setEntity(new StringEntity(json.toString()));
HttpResponse httpResponse = httpClient.execute(post);

if (httpResponse.getStatusLine().getStatusCode() == 200) {
HttpEntity entity = httpResponse.getEntity();
if (entity != null) {
// 获取服务器响应的json字符串
String jsonobj = EntityUtils.toString(entity);
System.out.println("jsonobj:" + jsonobj);
// 解析从服务器返回的json
JSONObject obj = new JSONObject(jsonobj);
JSONArray forumobj = new JSONArray();
forumobj = obj.optJSONArray("datalist");
JSONArray arr = new JSONArray(forumobj.toString());
ArrayList shuzhangyalist = new ArrayList();
for (int i = 0; i < arr.length(); i++) {
JSONObject temp = (JSONObject) arr.get(i);
String shuzhangyadata = temp
.getString("DiastolicPressure");
shuzhangyalist.add(shuzhangyadata);
}

}
}

} catch (Exception e) {
e.printStackTrace();
}
ListView listview = (ListView) findViewById(R.id.listView1);
ListAdapter adapter = new MyAdapter(this);
listview.setAdapter(adapter);
}

private class MyAdapter extends BaseAdapter {

private Context context;

private LayoutInflater inflater;

public ArrayList<String> arr;

public MyAdapter(Context context) {

super();

this.context = context;

inflater = LayoutInflater.from(context);

arr = new ArrayList<String>();

for (int i = 0; i < 7; i++) { // listview初始化3个子项

arr.add("");

}

}

@Override
public int getCount() {

// TODO Auto-generated method stub

return arr.size();

}

@Override
public Object getItem(int arg0) {

// TODO Auto-generated method stub

return arg0;

}

@Override
public long getItemId(int arg0) { 
 

// TODO Auto-generated method stub

return arg0;

}

public View getView(final int position, View view, ViewGroup arg2) {

// TODO Auto-generated method stub
ViewHolder holder;

if (view == null) {

view = inflater.inflate(
R.layout.graph_of_shuzhangya_list_item1, null);
holder = new ViewHolder();
holder.shuzhangyaview = (TextView) findViewById(R.id.ShuzhangyaView1);

holder.shuzhangyaview = (TextView) findViewById(R.id.ShuzhangyaView1);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}


return view;

}

private class ViewHolder {
private TextView shuzhangyaview;

}

}

public void data_back(View v) {
finish();
}



}

shuzhangyalist?你这变量 ,类命名也太....

 private class MyAdapter extends BaseAdapter {
 
ArrayList list;
Context context;
//你可以如楼上所说的写一个构造方法,将data传进去
public MyAdapter(Context context,ArrayList list){
       this.list = list;
       this.context = context;
}
// 或者set进去
//public void setData(ArrayList list){
//         this.list = list;
//}

}