我有一個活動與多個AsyncTask的,但是當我按回來按鈕,活動重新加載和AsyncTask的再次執行。我應該怎麼做回到上一個活動,而不是重新加載活動和asynctask?請幫忙。AsyncTask正在重新啓動,當我按下按鈕
public class LugarActivity extends SherlockActivity {
CargarDatos cargarDatos;
CargarComentarios cargarComentarios;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lugar);
cargarDatos = new CargarDatos();
cargarCometarios = new CargarComentarios();
loadData();
}
public void loadData(){
cargarDatos.execute();
}
public void loadOtherData(){
cargarComentarios.execute();
}
public class CargarDatos extends AsyncTask<Integer, Integer, String>{
@Override
protected String doInBackground(Integer... params) {
// here download data
}
@Override
protected void onPostExecute(String html) {
loadOtherData();
}
}
public class CargarComentarios extends AsyncTask<Integer, Integer, String>{
@Override
protected String doInBackground(Integer... params) {
// here download data
}
}
}
修復!
我固定與Singleton類的問題:
public class DataManager {
private static DataManager instance = null;
protected static boolean isShowingTheView = false;
protected DataManager() { }
public static synchronized DataManager getInstance() {
if (instance == null) {
instance = new DataManager();
}
return instance;
}
}
在活動
我添加以下代碼:
DataManager dataManager = new DataManager();
if(!dataManager.isShowingTheView){
loadData();
dataManager.isShowingTheView = true;
}else{
finish();
}
最後我重寫的onDestroy()方法
@Override
public void onDestroy(){
dataManager.isShowingTheView = false;
super.onDestroy();
}
有同樣的問題,我添加了一個如果驗證是否需要啓動loadData – Pull