checkUpdate(last_update, SplashActivity.this);
Intent l = new Intent(SplashActivity.this, MainActivity.class);
startActivity(l);
在上面的代码中，系统在checkUpdate的所有主体完全执行之前执行startActivity，这对我来说是个大问题
checkUpdate中的代码如下
private void checkUpdate(String last_update, final Context context) {
mydb = new DatabaseHelper(context);
Cursor res = mydb.get_options();
res.moveToFirst();
if (((res != null) && (res.getCount() > 0))) {
String dbLastUpdate = res.getString(0);
if (!last_update.equals(dbLastUpdate)) {
// Toast.makeText(context, "Database will be updated ", Toast.LENGTH_SHORT).show();
db_Request(context);
} else {
Intent l = new Intent(SplashActivity.this, MainActivity.class);
startActivity(l);
}
} else {
//Toast.makeText(context, "Database", Toast.LENGTH_SHORT).show();
db_Request(context);
}
return;
}
private void db_Request(final Context context) {
dialog = CustomProgressDialog.showProgressDialog(context, "Loading...");
mydb = new DatabaseHelper(context);
apiInterface = ApiClient.getClient().create(ApiInterface.class);
Call<DatabaseModel> call = apiInterface.providers();
call.enqueue(new Callback<DatabaseModel>() {
@Override
public void onResponse(Call<DatabaseModel> call, Response<DatabaseModel> response) {
DatabaseModel result = response.body();
if (result != null) {
Boolean status = response.body().isStatus();
String msg = response.body().getMsg();
if (status.equals(true)) {
mydb.delete();
DatabaseModel.Data data = response.body().getData();
List<DatabaseModel.Service_parameters> params = data.getService_parameters();
for (int i = 0; i < params.size(); i++) {
int id = params.get(i).getId();
String service_type = params.get(i).getService_type();
int external_system_id = params.get(i).getExternal_system_id();
int payment_service_id = params.get(i).getPayment_service_id();
String name_ar = params.get(i).getName_ar();
String name_en = params.get(i).getName_en();
int position = params.get(i).getPosition();
String visible = params.get(i).getVisible();
String required = params.get(i).getRequired();
String type = params.get(i).getType();
String is_client_id = params.get(i).getIs_client_id();
String default_value = params.get(i).getDefault_value();
int min_length = params.get(i).getMin_length();
int max_length = params.get(i).getMax_length();
mydb.insert_service_parameters(context, id, service_type, external_system_id, payment_service_id, name_ar, name_en,
position, visible, required, type, is_client_id, default_value, min_length, max_length);
}
List<DatabaseModel.Service_provider_categories> cat = data.getService_provider_categories();
for (int i = 0; i < cat.size(); i++) {
int id = cat.get(i).getId();
String name_ar = cat.get(i).getName_ar();
String name_en = cat.get(i).getName_en();
String description_ar = cat.get(i).getDescription_ar();
String description_en = cat.get(i).getDescription_en();
String icon = cat.get(i).getIcon();
mydb.insert_service_provider_categories(context, id, name_ar, name_en, description_ar, description_en, icon);
}
List<DatabaseModel.Service_providers> prov = data.getService_providers();
for (int i = 0; i < prov.size(); i++) {
int id = prov.get(i).getId();
int service_provider_category_id = prov.get(i).getService_provider_category_id();
String name_ar = prov.get(i).getName_ar();
String name_en = prov.get(i).getName_en();
String description_ar = prov.get(i).getDescription_ar();
String description_en = prov.get(i).getDescription_en();
String logo = prov.get(i).getLogo();
mydb.insert_service_providers(context, id, service_provider_category_id, name_ar, name_en, description_ar,
description_en, logo);
}
List<DatabaseModel.Services> serv = data.getServices();
for (int i = 0; i < serv.size(); i++) {
int id = serv.get(i).getId();
int service_provider_id = serv.get(i).getService_provider_id();
String name_ar = serv.get(i).getName_ar();
String name_en = serv.get(i).getName_en();
String description_ar = serv.get(i).getDescription_ar();
String description_en = serv.get(i).getDescription_en();
String icon = serv.get(i).getIcon();
mydb.insert_services(context, id, service_provider_id, name_ar, name_en, description_ar, description_en,
icon);
}
List<DatabaseModel.Options> opts = data.getOptions();
String name = opts.get(0).getName();
String value = opts.get(0).getValue();
mydb.insert_options(context, name, value);
Intent l = new Intent(SplashActivity.this, MainActivity.class);
startActivity(l);
dialog.dismiss();
}
} else {
/* CustomAlertDialog.getInstance().showInfoDialog(context.getString(R.string.error), context.getString(R.string.errorConnectingServer),
context.getString(R.string.close),
context, 1);*/
}
}
@Override
public void onFailure(Call<DatabaseModel> call, Throwable t) {
/* CustomAlertDialog.getInstance().showInfoDialog(context.getString(R.string.error), context.getString(R.string.errorConnectingServer),
context.getString(R.string.close),
context, 1);*/
dialog.dismiss();
}
});
}
N.B 我无法删除startActivity并将其放在checkUpdate正文
中所以，我想了解为什么会发生这种情况以及如何防止它