这是我的onCreate方法： -
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dept);
mAPIService = ApiUtils.getAPIService();
}
First Api call method:-
public void sendPost() {
mAPIService.savePost(params).enqueue(new Callback<Example>() {
@Override
public void onResponse(Call<Example> call, Response<Example> response) {
if(response.isSuccessful()) {
Example ex =response.body();
Log.e(TAG, "post submitted to API." + ex.toString());
Userdata us=ex.getUserdata();
Log.e(TAG,"Result:"+ex.getResult()+"\nUserData:"+ex.getUserdata());
Log.e(TAG,"\nemployee_ID:"+us.getEmployeeId()+"\neng_name:"+us.getEngName()+"\ndesg:"+us.getDesignation()+"\nemail:"+us.getEmail()+"\nlfa_office_id:"+us.getLfaofficeid()+"\nlfa_office_name:"+us.getLfaOfficeName());
Log.e(TAG,"\n message"+ex.getMessage());
Toast.makeText(getApplicationContext(), ""+ ex.getMessage(), Toast.LENGTH_SHORT).show();
if(ex.getMessage().contains("Successful")){
**datadump();**
}
else{
Toast.makeText(getApplicationContext(),"Something went wrong! Try again later!",Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onFailure(Call<Example> call, Throwable t) {
t.printStackTrace();
Log.e(TAG, "Unable to submit post to API.");
}
});
}
在datadump之后调用一些函数从不同的apis获取数据并将其保存在Sqlite数据库中 . 以下是被调用的函数： -
public void gedistrict() {
mAPIService = ApiUtils.getAPIService();
Observable<Dsitrict_result> call= mAPIService.savedistrict().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
call.subscribe(new Observer<Dsitrict_result>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(Dsitrict_result ex) {
dist=ex.getDistricts();
Log.e(TAG,"Result:"+ ex.getResult());
Log.e(TAG,"District:"+ex.getDistricts());
Log.e(TAG,"Message:"+ex.getMessage());
//Every district.
for(int i=0;i<dist.size();i++) {
Log.e(TAG, "\nState id:" + dist.get(i).getStateId() + "\nDistrict id:" + dist.get(i).getDistrictId() + "\nEng_name:" + dist.get(i).getEngName() + "\nMar_name:" + dist.get(i).getMarName());
}
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
@Override
public void onComplete() {
Log.e(TAG, "DONE RE BABA");
}
});
}
public void gettaluka() {
mAPIService = ApiUtils.getAPIService();
Observable<Taluka_result> call= mAPIService.savetaluka().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
call.subscribe(new Observer<Taluka_result>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(Taluka_result ex) {
taluk=ex.getTaluka();
Log.e(TAG,"Result:"+ ex.getResult());
Log.e(TAG,"District:"+ex.getTaluka());
Log.e(TAG,"Message:"+ex.getMessage());
for(int i=0;i<taluk.size();i++) {
Log.e(TAG, "\nState id:" + taluk.get(i).getStateId() + "\nDistrict id:" + taluk.get(i).getDistrictId() +"\nTaluka Id:"+taluk.get(i).getTalukaId() + "\nEng_name:" + taluk.get(i).getEngName() + "\nMar_name:" + taluk.get(i).getMarName());
}
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
Log.e(TAG, "DONE RE BABA");
}
}) ;
}
public void getvillage() {
mAPIService = ApiUtils.getAPIService();
Observable<Village_result> call= mAPIService.savevillage().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
call.subscribe(new Observer<Village_result>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(Village_result ex) {
villa=ex.getVillage();
Log.e(TAG,"Result:"+ ex.getResult());
Log.e(TAG,"District:"+ex.getVillage());
Log.e(TAG,"Message:"+ex.getMessage());
for(int i=0;i<villa.size();i++) {
Log.e(TAG, "\nState id:" + villa.get(i).getStateId() + "\nDistrict id:" + villa.get(i).getDistrictId() +"\nTaluka Id:"+villa.get(i).getTalukaId() +"\nVillage id: " +villa.get(i).getVillageId() + "\nEng_name:" + villa.get(i).getEngName() + "\nMar_name:" + villa.get(i).getMarName());
}
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
Log.e(TAG, "DONE RE BABA");
}
}) ;
}
public void getofficetype() {
mAPIService = ApiUtils.getAPIService();
Observable<Office_type_result> call= mAPIService.saveofficetype().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
call.subscribe(new Observer<Office_type_result>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(Office_type_result ex) {
oft=ex.getOfficeType();
Log.e(TAG,"Result:"+ ex.getResult());
Log.e(TAG,"District:"+ex.getOfficeType());
Log.e(TAG,"Message:"+ex.getMessage());
.
for(int i=0;i<oft.size();i++) {
Log.e(TAG, "\noffice_type:"+oft.get(i).getOfficeType()+"\neng_office_type_name:"+oft.get(i).getEngOfficeTypeName()+"\nmar_office_type_name:"+oft.get(i).getMarOfficeTypeName());
}
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
Log.e(TAG, "DONE RE BABA");
}
}) ;
}
这是我的改造创建者及其不同 endpoints 的界面Retrofit Client Builder
public class RetrofitClient {
private static Retrofit retrofit = null;
public static Retrofit getClient(String baseUrl) {
if (retrofit==null) {
retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
API服务接口
public interface APIService {
@POST("Login/checkUser/")
@FormUrlEncoded
Call <Example> savePost(params);
@POST("District")
Observable<Dsitrict_result> savedistrict();
@POST("Taluka")
Observable<Taluka_result> savetaluka();
@POST("Village")
Observable<Village_result> savevillage();
@POST("OfficeType")
Observable<Office_type_result> saveofficetype();
}
保存数据库
private void savetodb(){
//District Table
for(int i=0;i<dist.size();i++)
mydb.insertdataindistrictdb(dist.get(i).getStateId(),dist.get(i).getDistrictId(),dist.get(i).getEngName(),dist.get(i).getMarName());
//Taluka Table
for(int i=0;i<taluk.size();i++)
mydb.insertdataintalukadb(taluk.get(i).getStateId(),taluk.get(i).getDistrictId(),taluk.get(i).getTalukaId(),taluk.get(i).getEngName(),taluk.get(i).getMarName());
//Village Table
for(int i=0;i<villa.size();i++)
mydb.insertdatainvillagedb(villa.get(i).getStateId(),villa.get(i).getDistrictId(),villa.get(i).getTalukaId(),villa.get(i).getVillageId(),villa.get(i).getEngName(),villa.get(i).getMarName());
//Office Type Table
for(int i=0;i<oft.size();i++)
mydb.insertdatainofficetypedb(oft.get(i).getOfficeType(),oft.get(i).getEngOfficeTypeName(),oft.get(i).getMarOfficeTypeName());
Log.e(TAG,"Database Create");
}
MY ERROR //错误以斜体显示的行和粗体 .
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.trng18.myapplication, PID: 2424
java.lang.NullPointerException
at com.example.trng18.myapplication.Dept_login.savetodb(Dept_login.java:144)
at com.example.trng18.myapplication.Dept_login.datadump(Dept_login.java:138)
at com.example.trng18.myapplication.Dept_login.access$100(Dept_login.java:42)
at com.example.trng18.myapplication.Dept_login$1.onResponse(Dept_login.java:93)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:70)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
1 回答
那么错误发生时的代码：at