我有一个名为Login的片段，我有一个名为LoginAttempt的AsynkTask，它是从Login Fragment执行的，当前AsynkTask是Login Fragment的Inner类，现在我想要的是将AsynkTask与Login类分开并更新登录Fragment的UI。
我该怎么做？
这是我的登录片段，其中包含AsynkTask作为内部类：
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
m_Main = inflater.inflate(R.layout.login_screen, container, false);
((AppCompatActivity) getActivity()).getSupportActionBar().hide();
CMainActivity.m_Drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
m_oLoginSession = new CLoginSessionManagement(getActivity());
init();// initialize controls
return m_Main;
}
public void init() {
m_MainLayout = (LinearLayout) m_Main.findViewById(R.id.mainLayout);
m_InputMobile = (EditText) m_Main.findViewById(R.id.input_mobile);
m_InputPassword = (EditText) m_Main.findViewById(R.id.input_password);
m_LoginBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Login);
m_ChangePass = (AppCompatButton) m_Main.findViewById(R.id.btn_ChangePass);
m_ChangePass.setBackgroundColor(Color.TRANSPARENT);
m_ChangePass.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CChangePasswordScreen()).commit();
}
});
m_RegisterBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Register);
m_RegisterBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CRegistrationScreen()).commit();
}
});
m_LoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new LoginAttempt().execute();
}
});
}
private class LoginAttempt extends AsyncTask<String, Void, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setCancelable(false);
pDialog.setProgressStyle(android.R.style.Widget_ProgressBar_Small);
// and now the magic
pDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
pDialog.getWindow().setGravity(Gravity.BOTTOM);
pDialog.getWindow().getAttributes().verticalMargin = 0.5f;
pDialog.show();
// CProgressBar.getInstance().showProgressBar(getActivity(), "Please wait while Logging...");// showing progress ..........
}
@Override
protected String doInBackground(String... params) {
getLoginDetails();// getting login details from editText...........
InputStream inputStream = null;
m_oJsonsResponse = new CJsonsResponse();
isFirstLogin = true;
try {
// 1. create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// 2. make POST request to the given URL
HttpPost httpPost = new HttpPost(s_szLoginUrl);
String json = "";
// 3. build jsonObject
JSONObject jsonObject = new JSONObject();
jsonObject.put("agentCode", s_szMobileNumber);
jsonObject.put("pin", s_szPassword);
jsonObject.put("firstloginflag", m_oLoginSession.isLogin());
// 4. convert JSONObject to JSON to String
json = jsonObject.toString();
// 5. set json to StringEntity
StringEntity se = new StringEntity(json);
// 6. set httpPost Entity
httpPost.setEntity(se);
// 7. Set some headers to inform server about the type of the content
// httpPost.setHeader("Accept", "application/json"); ///not required
httpPost.setHeader("Content-type", "application/json");
// 8. Execute POST request to the given URL
HttpResponse httpResponse = httpclient.execute(httpPost);
HttpEntity entity = httpResponse.getEntity();
// 9. receive response as inputStream
inputStream = entity.getContent();
System.out.print("InputStream...." + inputStream.toString());
System.out.print("Response...." + httpResponse.toString());
StatusLine statusLine = httpResponse.getStatusLine();
System.out.print("statusLine......" + statusLine.toString());
////Log.d("resp_body", resp_body.toString());
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
// 10. convert inputstream to string
if (inputStream != null) {
s_szresult = m_oJsonsResponse.convertInputStreamToString(inputStream);
//String resp_body =
EntityUtils.toString(httpResponse.getEntity());
}
} else
s_szresult = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return s_szresult;
}
@Override
protected void onPostExecute(final String response) {
super.onPostExecute(response);
m_Handler = new Handler();
new Thread(new Runnable() {
@Override
public void run() {
m_Handler.post(new Runnable() {
@Override
public void run() {
CProgressBar.getInstance().hideProgressBar();// hide progressbar after getting response from server......
try {
m_oResponseobject = new JSONObject(response);// getting response from server
new Thread() {// making child thread...
public void run() {
Looper.prepare();
try {
getResponse();// getting response from server ........
Looper.loop();
} catch (JSONException e) {
e.printStackTrace();
}
}
}.start();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
}).start();
}
public void getResponse() throws JSONException {
if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Transaction Successful")) {
m_oLoginSession.setLoginData(s_szResponseMobile, s_szResponsePassword);
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CDealMainListing()).commit();
CToastMessage.getInstance().showToast(getActivity(), "You are successfully Logged In");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Agentcode Can Not Be Empty")) {
CToastMessage.getInstance().showToast(getActivity(), "Please Enter Valid Mobile Number");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Pin Can Not Be Empty")) {
CToastMessage.getInstance().showToast(getActivity(), "Please Enter Password");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Invalid PIN")) {
CToastMessage.getInstance().showToast(getActivity(), "Please enter correct Password");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Blocked due to Wrong Attempts")) {
CToastMessage.getInstance().showToast(getActivity(), "You are blocked as You finished your all attempt");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Connection Not Available")) {
CToastMessage.getInstance().showToast(getActivity(), "Connection Lost ! Please Try Again");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Not Found")) {
CToastMessage.getInstance().showToast(getActivity(), "User not found ! Kindly Regiter before Login");
} else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("OTP not verify")) {
CToastMessage.getInstance().showToast(getActivity(), "Otp not Verify ! Kindly Generate Otp on Sign Up");
}
}
public void getLoginDetails() {
s_szMobileNumber = m_InputMobile.getText().toString();
s_szPassword = m_InputPassword.getText().toString();
}
}
}
我希望这个AsynkTask与Login类的Login Class和Update UI分开。
答案 0 :(得分：0)
单独的班级AsyncTask：
public class LoginAttempt extends AsyncTask<String, Void, String>{
private OnTaskComplete callback;
public LoginAttempt(OnTaskComplete onTaskComplete, ...){
callback = onTaskComplete;
... // some other data if needed.
}
@Override
protected String doInBackground(String... params) {
...
}
@Override
protected void onPostExecute(final String response) {
super.onPostExecute(response);
if(callback!=null){
callback.onSuccess(data);
// similarly for failure.
}
}
}
// interface used for communicating back to origin activity or fragment
public interface OnTaskComplete{
void onSuccess(Object result);
void onFailure(Object error);
}
现在在activity或fragment