Develop Reference

Android Retrofit Post Data

I am working with an Android Recyclerview with Retrofit, it is working without any Post Data. I need to post some data in my current Code.
Below is my Current ApiInterface
public interface ApiInterface {
#GET("mypage.php")
Call<Pojo> getData();
}
And in my activity I am calling this by below code
ApiInterface apiInterface = (ApiInterface) RetrofitClient.getRetrofitInstance().create(ApiInterface.class);
Call<Pojo> listingdata = apiInterface.getData();
listingdata.enqueue(new Callback<Pojo>() {
#Override
public void onResponse(Call<Pojo> call, Response<Pojo> response) {
if(response.isSuccessful()){
recycleradpter recycleradpter = new recycleradpter(response.body().getData());
recyclerView.setAdapter(recycleradpter);
progressbar2.setVisibility(View.GONE);
}
}
#Override
public void onFailure(Call<Pojo> call, Throwable t) {
//System.out.println("12345678934567890234567890");
//Toast.makeText(getActivity(), "No Connected internet", Toast.LENGTH_SHORT).show();
progressbar2.setVisibility(View.GONE);
dialogfunction();
}
});
How Can I get data based on passed data in above code

If you want to send a post request then you have to create a method like below. The calling of the method will be similar to that of get request. Just pass the parameters of your post body. You can for details here.
#POST("mypage.php")
Call<Pojo> postData(
#Field("param1") String param1,
#Field("param2") int param2
);

#FormUrlEncoded
#POST("your_php_file.php")
Call<ResponseBody> getLanguageCall(#Field("lang_code") String lang_code, #Field("app_id") String app_id);
private void getLanguageCall() {
progressDialog.setVisibility(VISIBLE);
Call<ResponseBody> call = ApiClient.getClient().create(ApiInterface.class).getLanguageCall(PreferenceManager.getStringPreference(SplashActivity.this, appLanguage), PreferenceManager.getStringPreference(SplashActivity.this, PreferenceManager.APP_ID));
call.enqueue(new Callback<ResponseBody>() {
#Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
progressDialog.setVisibility(View.GONE);
if (!response.isSuccessful()) {
showToast(response.code() + " : " + response.message());
return;
}
try {
JSONObject root = new JSONObject(response.body().string());
HashMap<String, String> list = new HashMap<String, String>();
JSONArray keyData = root.getJSONArray("key_data");
for (int i = 0; i < keyData.length(); i++) {
JSONObject obj = keyData.getJSONObject(i);
list.put(obj.getString("Key_Name").toLowerCase(), obj.getString("Key_Value"));
}
finish();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
t.printStackTrace();
progressDialog.setVisibility(View.GONE);
showToast("Error ! Server Error.");
}
});
}

Android - Retrofit does not display data

I'm trying to learn Retrofit making simple weather app and I have some problem. I made two methods to display data in Activity and method does not work outside onCreate, but second one in works. In Android Profiler I can see JSON logs, but still I don't see anything in Activity. What's the problem?
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(WeatherAPI_Interface.API_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
WeatherAPI_Interface weatherAPIInterface = retrofit.create(WeatherAPI_Interface.class);
latitude = 37.8267;
longitude = -122.4233;
Call<Currently> call = weatherAPIInterface.getWeather(latitude, longitude);
call.enqueue(new Callback<Currently>() {
#Override
public void onResponse(#NonNull Call<Currently> call, #NonNull Response<Currently> response) {
temp_textview.setText(String.valueOf(response.body().getCurrently().getTemperature()));
city_textview.setText(response.body().getTimezone());
image_View.setImageResource(Integer.parseInt(response.body().getCurrently().getIcon()));
}
#Override
public void onFailure(#NonNull Call<Currently> call, #NonNull Throwable t) {
}
});
}
#Override
public void getCurrentWeather(final Currently currently) {
latitude = 37.8267;
longitude = -122.4233;
NetworkClient.getInstance().getWeather(latitude, longitude).enqueue(new Callback<Currently>() {
#Override
public void onResponse(#NonNull Call<Currently> call, #NonNull Response<Currently> response) {
weather_textview.setText((CharSequence) response.body().getCurrently().getSummary());
pressure_textview.setText((CharSequence) response.body().getDaily().getData());
temp_textview.setText(String.valueOf(currently.getCurrently().getTemperature()));
Log.d(TAG, "City" + currently.getLatitude());
}
#Override
public void onFailure(Call<Currently> call, Throwable t) {
Log.d(TAG, "Failed" + t.getMessage());
}
});
}
public class NetworkClient {
private static WeatherAPI_Interface service;
public static WeatherAPI_Interface getInstance() {
if (service == null) {
Retrofit retrofit = new Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(WeatherAPI_Interface.API_URL)
.build();
service = retrofit.create(WeatherAPI_Interface.class);
return service;
}
else {
return service;
}
}
}

You didn't call the function how can it work?
when the activity starts it'll run the code in OnCreate ( and any call in it) only, so to run any function outside it you need to call it.

How to set Value which is get from Common class(retrofit)

I have fragment and Common class which inside it used retrofit callback..I have Connect_and_get class.It sends request to server and gets information.I must use this information in my fragment.. But I can't return result onResponse.How can I do it..(Response is coming well from server)
Please see my code
public class Connect_and_Get {
private int size;
private OkHttpClient.Builder httpClient;
private ApiService client;
private Call<Response> call;
private MyPreference myPreference;
String a[] = {"secret"};
String b[] = {"secret"};
public int Connect_and_Get() {
Requests request;
request = new Requests("tasks.list", new params(20, 0, a, b, "", "", "", "", ""));
httpClient = new OkHttpClient.Builder();
httpClient.addInterceptor(new Interceptor() {
#Override
public okhttp3.Response intercept(Chain chain) throws IOException {
Request request = chain.request().newBuilder().addHeader("Authorization", "Bearer " + "secret").build();
return chain.proceed(request);
}
});
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constants.baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.client(httpClient.build())
.build();
client = retrofit.create(ApiService.class);
call = client.getDocument(request);
call.enqueue(new Callback<Response>() {
#Override
public void onResponse(Call<Response> call, retrofit2.Response<Response> response) {
size = response.body().getResult().getList().size();
}
#Override
public void onFailure(Call<Response> call, Throwable t) {
}
});
//retruning information
return size;
}
}
and result from common class coming 0;Because it doesn't wait my response so it is returning 0;
In fragment
Connect_and_Get a = new Connect_and_Get();
int getting = a.Connect_and_Get();
Log.d("mylog", "result:"+String.valueOf(getting));

Declare an interface like this
public interface ResponseListener {
public int onResponse(int size);
}
and use below code in your activity
public class MainActivity extends AppCompatActivity implements ResponseListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Connect_and_Get().Connect_and_Get(this);
}
#Override
public int onResponse(int size) {
// to do
return 0;
}
}
modify your connect class like this
public class Connect_and_Get {
public int Connect_and_Get(ResponseListener responseListener) {
// as it was
call.enqueue(new Callback<Response>() {
#Override
public void onResponse(Call<Response> call, retrofit2.Response<Response> response) {
size = response.body().getResult().getList().size();
responseListener.onResponse(size);
}
#Override
public void onFailure(Call<Response> call, Throwable t) {
}
});
}
}

You need to check whether your response is successful or not.
Check the code below.
call.enqueue(new Callback<Response>() {
#Override
public void onResponse(Call<Response> call, retrofit2.Response<Response> response) {
if(response.isSuccessful()){
//enter code here
} else {
//Error Message
}
}
#Override
public void onFailure(Call<Response> call, Throwable t) {
Log.e("Log", "Error -> "+t.getLocalizedMessage());
}
});

You can use an event bus like (rxbus,otto, etc..) to post events across your app when the response from the api ready to use .
Retrofit callback sample code:
call.enqueue(new Callback<Response>() {
#Override
public void onResponse(Call<Response> call, retrofit2.Response<Response> response) {
Bus.getInstance.post(Event)
}
#Override
public void onFailure(Call<Response> call, Throwable t) {
}
});
Fragment sample:
#Override
protected void onCreate(Bundle savedInstanceState) {
Bus.getInstance.register(this)
}
#Subscribe
public void onCallDone(Event response) {
//enter code here
}

android - download file with retrofit 2.0

I am using retrofit 2.0 for download a file.the problem is enqueue method not called. there is no error and no catch. nothing happen, where is my mistake?
this is my interface:
public interface ApiService {
#GET("uploads/{file_name}")
Call<ServerResponse> downloadFile(#Path("file_name") String fileName);
}
and this is my downloading code :
private void downloadFile() {
progressDialog.show();
// Map is used to multipart the file using okhttp3.RequestBody
File file = new File(mediaPath);
// Parsing any Media type file
RequestBody requestBody = RequestBody.create(MediaType.parse("*/*"), file);
ApiService getResponse = ApiClient.getClient().create(ApiService.class);
Call<ServerResponse> call = getResponse.downloadFile(file.getName());
call.enqueue(new Callback<ServerResponse>() {
#Override
public void onResponse(Call<ServerResponse> call, Response<ServerResponse> response) {
ServerResponse serverResponse = response.body();
if (serverResponse != null) {
if (serverResponse.getSuccess()) {
Toast.makeText(getApplicationContext(), serverResponse.getMessage(),Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), serverResponse.getMessage(),Toast.LENGTH_SHORT).show();
}
} else {
assert serverResponse != null;
Log.v("Response", serverResponse.toString());
}
progressDialog.dismiss();
}
#Override
public void onFailure(Call<ServerResponse> call, Throwable t) {
}
});
}

Probably, you are referring that the method "enqueue()" is called, but it's not the onResponse one.
Please wait some time (a minute is fine) and make sure that onResponse nor onFailure are called.
If you want more info, you can use the HTTP logging interceptor

#POST("uploads/{file_name}")
Observable<Document> getDocumentsList(#Path("file_name") String fileName);
and the code webservice call should be
Observable<Document> listObservable = mApiService.getDocumentsList(path);
subscribe(listObservable, new Consumer<Document>() {
#Override
public void accept(Document resourceDtos) throws Exception {
fillDocs(resourceDtos.getData());
}
}, new Consumer<Throwable>() {
#Override
public void accept(Throwable throwable) throws Exception {
fillDocs(throwable.getMessage());
}
});

enqueue multiple GET request when using nested retrofit 2.0

I am using Retrofit 2.0 to make api calls with nesting multiple requests. All api's works fine individually.
But when i nested all retrofit, First request execute perfectly but after that when i register second request it's not callback in enqueue method (i.e. it's directly returning null without inserting enqueue's inner methods like onResponse, onFailure)
My Code :-
public class Main2Activity extends AppCompatActivity {
Gson gson;
JSONObject jsonResult=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
gson=new GsonBuilder().create();
firstRequest(); //-- First retrofit request
}
private void firstRequest() {
Retrofit retrofit=new Retrofit.Builder().baseUrl(getResources().getString(R.string.Api_Url)).addConverterFactory(GsonConverterFactory.create(gson)).build();
CityRetailsApi service = retrofit.create(CityRetailsApi.class);
Call call_first= service.getMainCatFlag();
call_first.enqueue(new Callback() {
#Override
public void onResponse(Call call, Response response) {
Log.d("MainActivity", "Status Code = " + response.code());
if (response.isSuccessful()){
MainCatFlag result = (MainCatFlag) response.body(); //-- Get First request response
JSONObject json2nd = secondRequest(); //-- Second request
}
}
#Override
public void onFailure(Call call, Throwable t) {
Log.d("MainActivity", "Error");
}
});
}
private JSONObject secondRequest() {
try {
Retrofit retrofit=new Retrofit.Builder().baseUrl(getResources().getString(R.string.Api_Url)).addConverterFactory(GsonConverterFactory.create(gson)).build();
CityRetailsApi service = retrofit.create(CityRetailsApi.class);
Call call_second= service.getMainCat();
call_second.enqueue(new Callback() {
#Override
public void onResponse(Call call2, Response response1) {
Log.d("MainActivity", "Status Code = " + response1.code());
if (response1.isSuccessful()) {
MainCat result = (MainCat) response1.body();
if (result.getSuccess()==1)
{
try {
jsonResult= new JSONObject(new Gson().toJson(result));
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
#Override
public void onFailure(Call call, Throwable t) {
Log.d("MainActivity", "Error");
}
});
}catch (Exception e){
Log.d("MainActivity", "Error= " + e);
}
return jsonResult;
}
}
In above code firstRequest() executed correctly and proving response but the secondRequest (inside firstRequest() enqueue method) not working fine. Not showing any error, success message in console. Can any one please help me to override this problem.
If any problem in my code, please let me know.
Thank you in advance.

You made a mistake that when you using retrofit enquene,it's called asynchronously, so you can't get the result outside of the callback method!
So, you should process your result inside the onResponse method like this:
private void secondRequest() {
try {
call_second.enqueue(new Callback() {
#Override
public void onResponse(Call call2, Response response1) {
Log.d("MainActivity", "Status Code = " + response1.code());
if (response1.isSuccessful()) {
MainCat result = (MainCat) response1.body();
if (result.getSuccess()==1)
{
try {
jsonResult= new JSONObject(new Gson().toJson(result));
// process your jsonResult here
...
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
#Override
public void onFailure(Call call, Throwable t) {
Log.d("MainActivity", "Error");
}
});
}catch (Exception e){
Log.d("MainActivity", "Error= " + e);
}
}