在我的應用程序中,我一直在使用我的web服務調用的翻新。它工作正常,但是當應用程序投入到後臺崩潰,並得到了錯誤日誌中,安卓空指針在改造響應中的異常
java.lang.NullPointerException: Attempt to invoke interface method 'void retrofit.Callback.failure(retrofit.RetrofitError)' on a null object reference
at retrofit.CallbackRunnable$2.run(CallbackRunnable.java:53)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Can anyone help me to overcome this issue..??
這是我改造的客戶端類,
public class RetrofitClient {
private static RetrofitCommonService RETROFIT_CLIENT;
public RetrofitClient() {}
public static RetrofitCommonService getInstance() {
//if REST_CLIENT is null then set-up again.
if (RETROFIT_CLIENT == null) {
setupRestClient();
}
return RETROFIT_CLIENT;
}
private static void setupRestClient() {
RestAdapter restAdapter = new RestAdapter.Builder()
.setClient(new OkClient(new OkHttpClient()))
.setEndpoint(Constants.BASE_URL)
//.setLogLevel(RestAdapter.LogLevel.FULL)
.build();
RETROFIT_CLIENT = restAdapter.create(RetrofitCommonService.class);
}
}
這是我改造服務接口,
public interface RetrofitCommonService {
@FormUrlEncoded
@POST("/user")
void doRegistration(@Field("user[mobile_number]") String phone, @Field("user[new_uid]") String imei,
Callback<RetrofitResponse> response);
}
而這種方式我打電話給我的活動和活動實施改造回調改造服務。
RetrofitCommonService mRetrofitCommonService = RetrofitClient.getInstance();
mRetrofitCommonService.doRegistration(mPhoneNumber, getDeviceId(), this);
public class RegistrationActivity extends Activity implements Callback<RetrofitResponse>{
}
@Override
public void success(RetrofitResponse retrofitResponse, Response response) {
}
@Override
public void failure(RetrofitError error) {
}
您提供的不僅僅是錯誤消息。它表示'Callback'對象是'null'。因此,請確保您始終使用有效的「回撥」進行異步調用。 – Henry
在這裏放一些代碼這太含糊 – Piyush
好吧,我會在這裏發佈我的代碼 – Nidheesh