如何捕捉AsyncTask完成时的瞬间? 我有一个ProfileUpdate类,它扩展了AsyncTask,从另一个活动我调用这个方法,然后我需要更新我的数据。怎么知道asynctask完成了? 我的asynctask方法在另一个类而不是活动类!!!
这是我在活动中的onRefresh方法:
@Override
public void onRefresh() {
if (!AlertView.isInternetAvailable(getContext())) {
swipeLayout.setRefreshing(false);
Toast.makeText(getContext(), Messages.CONNECTION_ERROR + ": " + Messages.NO_INTERNET, Toast.LENGTH_SHORT).show();
} else {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
new UpdateProfile(getActivity(), swipeLayout, sharedPreferences.getString(Constants.TOKEN, ""), user.getIin()).execute(Urls.GET_USER);
}
});
profileDefaults();
}
}
这里是我的AsyncTask方法:
public class UpdateProfile extends AsyncTask <String, Void, String> {
private Activity activity;
private SwipeRefreshLayout swipeRefreshLayout;
private String token;
private String userIin;
private SharedPreferences sharedPreferences;
public UpdateProfile(Activity activity, SwipeRefreshLayout swipeRefreshLayout, String token, String userIin) {
this.activity = activity;
this.swipeRefreshLayout = swipeRefreshLayout;
this.token = token;
this.userIin = userIin;
sharedPreferences = this.activity.getSharedPreferences(Constants.PROJECT, Context.MODE_PRIVATE);
}
@Override
protected String doInBackground(String... params) {
URL url = null;
try {
url = new URL(params[0]);
try {
OkHttpClient okHttpClient = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("iin", userIin)
.build();
Request request = new Request.Builder()
.url(url)
.addHeader(Constants.AUTH_TOKEN, token)
.post(body)
.build();
Response responses = null;
try {
responses = okHttpClient.newCall(request).execute();
} catch (Exception e) {
AlertView.showAlertView(activity, Messages.CONNECTION_ERROR, Messages.NO_INTERNET, Messages.OK);
}
assert responses != null;
return responses.body().string();
} catch (Exception e) {
AlertView.showAlertView(activity, Messages.CONNECTION_ERROR, Messages.NO_INTERNET, Messages.OK);
}
} catch (Exception e) {
AlertView.showAlertView(activity, Messages.CONNECTION_ERROR, Messages.NO_INTERNET, Messages.OK);
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
try {
JSONObject jsonObject = new JSONObject(s);
int code = Integer.valueOf(jsonObject.getString(Constants.CODE));
if (code == Codes.OK) {
Toast.makeText(activity, "Данные обновлены", Toast.LENGTH_SHORT).show();
String userHeader = jsonObject.getString("user");
JSONObject userInfo = new JSONObject(userHeader);
String mobilePhone = userInfo.getString(SingletonConstants.MOBILE_PHONE);
Boolean isActive = userInfo.getBoolean(SingletonConstants.IS_ACTIVE);
Boolean signedAgreement = userInfo.getBoolean(SingletonConstants.SIGNED_AGREEMENT);
Boolean esfEntered = userInfo.getBoolean(SingletonConstants.ESF_ENTERED);
String address = userInfo.getString(SingletonConstants.ADDRESS);
String iin = userInfo.getString(SingletonConstants.IIN);
String certExpDate = userInfo.getString(SingletonConstants.CERT_EXP_DATE);
String firstName = userInfo.getString(SingletonConstants.FIRST_NAME);
String middleName = userInfo.getString(SingletonConstants.MIDDLE_NAME);
String workPhone = userInfo.getString(SingletonConstants.WORK_PHONE);
String secondName = userInfo.getString(SingletonConstants.SECOND_NAME);
String avatarUrl = userInfo.getString(SingletonConstants.AVATAR_URL);;
String secondEmail = userInfo.getString(SingletonConstants.SECOND_EMAIL);
String email = userInfo.getString(SingletonConstants.EMAIL);
User newUser = new User(mobilePhone, isActive, signedAgreement, esfEntered, address, iin, certExpDate, firstName, middleName, workPhone, secondName, avatarUrl, secondEmail, email);
Gson gson = new Gson ();
String userGson = gson.toJson (newUser);
sharedPreferences.edit().putString(SingletonConstants.USER, userGson).apply();
swipeRefreshLayout.setRefreshing(false);
} else {
AlertView.showAlertView(activity, Messages.ERROR, jsonObject.getString(Constants.MESSAGE), Messages.OK);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
如何调用profileDefaults()?这是我的活动。我需要在onPostExecute之后调用它!
答案 0 :(得分:1)
更简洁的方法是使用接口作为侦听器。 创建此界面:
public interface OnAsyncFinished{
void onAsyncFinished(Object o);
}
在AsyncTaskClass构造函数中将接口添加为参数:
private OnAsyncFinished onAsyncFinished;
public UpdateProfile(..., OnAsyncFinished onAsyncFinished) {
...
this.onAsyncFinished = onAsyncFinished;
}
...
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
onAsyncFinished.onAsyncFinished(s); //This will notifiy the method on main activity, and you can now resume the work there
...
}
在主要活动中实施界面:
public MainActivity extends Activity implements OnAsyncFinished {
@Override
public void onAsyncFinished(Object o) {
//This will get called after onPostExecute, do what u want with the object you got from onPostExecute, json or string in ur example
profileDefaults(); //call ur function
}
}
修改强>
在主要活动中创建异步任务时,在构造函数Likeo中传递this
:
@Override
public void run() {
new UpdateProfile(..., this).execute(Urls.GET_USER);
}