我需要在列表视图中向数据库显示查询结果。我正在返回查询2个值(“cod”,“value”)。我想用一个 SimpleAdapter 来解决这个问题,但是没有用。
这是我的代码:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.techcharacteristic);
PopulateTechCharacteristicList populateList = new PopulateTechCharacteristicList(
this);
populateList.execute();
SimpleAdapter adapter = new SimpleAdapter(this, list,
R.layout.techcharacteristic_rows,
new String[] {"cod", "value"}, new int[] {
R.id.techCharacteristic, R.id.techCharacteristicName });
setListAdapter(adapter);
}
public class PopulateTechCharacteristicList extends
AsyncTask<Integer, String, Integer> {
ProgressDialog progress;
Context context;
public PopulateTechCharacteristicList(Context context) {
this.context = context;
}
protected void onPreExecute() {
progress = ProgressDialog.show(TechCharacteristicList.this,
getResources().getString(R.string.Wait), getResources()
.getString(R.string.LoadingOperations));
}
protected Integer doInBackground(Integer... paramss) {
ArrayList<TechCharacteristic> arrayTechChar = new ArrayList<TechCharacteristic>();
TechCharacteristicWSQueries techCharWSQueries = new TechCharacteristicWSQueries();
try {
arrayTechChar = techCharWSQueries
.selectTechCharacteristicByAsset("ARCH-0026");
HashMap<String, String> temp = new HashMap<String,
for(TechCharacteristic strAux : arrayTechChar)
{
temp.put("cod", strAux.getTechCharacteristic() + " - " + strAux.getTechCharacteristicName());
temp.put("value", strAux.getTechCharacteristicValue());
list.add(temp);
}
} catch (QueryException e) {
e.printStackTrace();
return 0;
}
return 1;
}
protected void onPostExecute(Integer result) {
if(result == 1)
progress.dismiss();
}
}
由于 utlizando 使用相同的代码(“cod”、“value”)在 HashMap 中包含值,我的 listView 总是显示最后插入的项目。但是在我的声明中,SimpleAdapter'm 使用硬编码(“cod”,“value”),并且每当我在 HashMap 中放入除(“cod”,“value”)以外的任何值时,listView 都为空。
谁能帮我?