Application of Retrofit in projects and Application of Retrofit projects

Application of Retrofit in projects and Application of Retrofit projects

Define an annotation to serialize bean Fields

Import java. lang. annotation. documented; import java. lang. annotation. elementType; import java. lang. annotation. retention; import java. lang. annotation. retentionPolicy; import java. lang. annotation. target;/*** used for Gson naming policy annotation */@ incluented @ Retention (RetentionPolicy. RUNTIME) @ Target (ElementType. FIELD) public @ interface ParamName {String value ();}

Annotation of the bean to be transmitted over the network:

public class requestBean implements Parcelable {public static final int RESPONSE_OK = 1;@ParamName("id") private String mId;@ParamName("name") private String mName;@ParamName("result")private int mResult;@ParamName("message")private String mMessage;public int getResult() {return mResult;}public String getMessage() {return mMessage;}public String getId() {return mId;} public String getName() { return mName; }public boolean succeed() {return getResult() == RESPONSE_OK;}}

Encapsulate the defined annotation into gson

Import com. google. gson. fieldNamingPolicy; import com. google. gson. fieldNamingStrategy; import com. google. gson. gson; import com. google. gson. gsonBuilder; import com. newandbie. privatecustomize. config; import com. newandbie. privatecustomize. annotate. paramName; import com. newandbie. privatecustomize. model. gender; import java. lang. reflect. field;/*** custom Gson */public class GsonUtils {public static Gson newInstan Ce () {GsonBuilder builder = new GsonBuilder (); builder. setFieldNamingStrategy (new AnnotateNaming (); return builder. create ();} private static class AnnotateNaming implements FieldNamingStrategy {@ Override public String translateName (Field field) {ParamName a = Field. getAnnotation (ParamName. class); return! = Null? A. value (): FieldNamingPolicy. IDENTITY. translateName (field );}}}

Import com. squareup. okhttp. cache; import com. squareup. okhttp. okHttpClient; import android. content. context; import java. io. file; import java. io. IOException; import java. util. concurrent. timeUnit;/*** OkHttpClient custom tool class */public class OkHttpUtils {private static OkHttpClient singleton; public static OkHttpClient getInstance (Context context) {if (singleton = null) {synchronized (OkHttpUtils. class) {if (singleton = null) {File cacheDir = new File (context. getCacheDir (), Config. RESPONSE_CACHE); singleton = new OkHttpClient (); try {singleton. setCache (new Cache (cacheDir, Config. RESPONSE_CACHE_SIZE);} catch (IOException e) {e. printStackTrace ();} singleton. setConnectTimeout (Config. HTTP_CONNECT_TIMEOUT, TimeUnit. MILLISECONDS); singleton. setReadTimeout (Config. HTTP_READ_TIMEOUT, TimeUnit. MILLISECONDS) ;}}return singleton ;}}

Define the fit tool to configure the above two tools to paifitutils

Import android. content. context; import into fit. restAdapter; import pull fit. client. okClient; import into fit. converter. gsonConverter; public class extends fitutils {private static RestAdapter singleton; public static <T> T createApi (Context context, Class <T> clazz) {if (singleton = null) {synchronized (synchronized fitutils. class) {if (singleton = null) {RestAdapter. builder builder = new RestAdapter. build Er (); builder. setEndpoint (IP address); // sets the remote address builder. setConverter (new GsonConverter (GsonUtils. newInstance (); builder. setClient (new OkClient (OkHttpUtils. getInstance (context); builder. setLogLevel (Config. DEBUG? RestAdapter. LogLevel. FULL: RestAdapter. LogLevel. NONE); singleton = builder. build () ;}} return singleton. create (clazz );}}

The toolset is ready,

Put 'fit fit' in the parent class for the subclass to call

Import into fit. callback; import into fit. optional fiterror; import invalid fit. client. response;/*** interface base class */public class BaseActivity extends ActionBarActivity {.... /*** create an API instance ** @ param cls Api definition Class type * @ param <T> type * @ return API instance */public <T> T createApi (Class <T> cls) {return optional fitutils. createApi (this, cls);} public static abstract class ActivityCallback <T> implements Callback <T> {<span styl E = "white-space: pre"> </span> // soft reference, cache reference object private final WeakReference <BaseActivity> mRef; public ActivityCallback (BaseActivity activity) {mRef = new WeakReference <BaseActivity> (activity);} public Activity getActivity () {return mRef. get () ;}@ Override public void failure (writable fiterror error) {final BaseActivity activity = mRef. get (); Response response = error. getResponse (); if (response! = Null) {Toast. makeText (activity, activity. getString (R. string. server_error), Toast. LENGTH_SHORT ). show (); Log. e (getLogTag (), "code:" + response. getStatus () + ", reason:" + response. getReason (); error. printStackTrace ();}}}.....}

Define the following rest api interface. This interface defines a function ask, which will access the server's // ellassy/teacher/ask through the HTTP post request
And encapsulate the returned results as the requestBean Java object to return.

import retrofit.Callback;import retrofit.http.Field;import retrofit.http.FormUrlEncoded;import retrofit.http.Header;import retrofit.http.POST;public interface ExpertApi {    @FormUrlEncoded    @POST("/ellassy/teacher/ask")    void ask(@Header("token") String token, @Field("member_id") String memberId,            @Field("title") String title, @Field("description") String description,            @Field("teacher_id") String expertId,            Callback<requestBean> cb);}

The rect client requests the server

Import android. content. context; import android. content. intent; import android. OS. bundle; import android. view. view; import android. widget. button; import android. widget. editText; import android. widget. toast; import into fit. client. response; public class AskActivity extends implements View. onClickListener {private ExpertApi mExpertApi ;//... @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState );//... mExpertApi = createApi (ExpertApi. class) ;}@ Override public void onClick (View v ){//... call the rest interface mExpertApi. ask (getToken (), mUserInfo. getId (), title, question, mExpertId, new AskCallback (AskActivity. this);} // The callback interface returns the private static final class AskCallback extends ActivityCallback <requestBean> {public AskCallback (AskActivity activity) {super (activity );} @ Override public void success (requestBean requestbean, Response response) {AskActivity activity = (AskActivity) getActivity (); if (requestbean. succeed () {Toast. makeText (activity, "data returned successfully", Toast. LENGTH_SHORT ). show (); activity. finish ();} else {Toast. makeText (activity, askResponse. getMessage (), Toast. LENGTH_SHORT ). show ();}}}}