使用vivo推送服务SDK时，必须在turnOnPush成功后再getRegId，否则拿到regId的为null

应该在turnOnPush的IPushActionListener.onStateChanged方法中或被调用之后再getRegId

import com.vivo.push.IPushActionListener;
import com.vivo.push.PushClient;
import com.vivo.push.PushConfig;
import com.vivo.push.util.VivoPushException;

public class VivoPushService {

    public VivoPushService() {

        try {
            PushConfig config = new PushConfig.Builder().agreePrivacyStatement(true).build();
            PushClient.getInstance(MyApplication.myApplicationContext).initialize(config);
        } catch (VivoPushException e) {
            LogUtils.LogD("此处异常说明是有必须的vpush配置未配置所致，需要仔细检查集成指南的各项配置");
            e.printStackTrace();
        }

        // 打开push开关, 关闭为turnOffPush，详见api接入文档
        PushClient.getInstance(MyApplication.myApplicationContext).turnOnPush(new IPushActionListener() {
            @Override
            public void onStateChanged(int state) {
                // TODO: 开关状态处理， 0代表成功，获取regid建议在state=0后获取；
                if (state == 0) {
                    PushClient.getInstance(MyApplication.myApplicationContext).getRegId(new VivoMsgCallbackService());
                }
            }
        });
        // 若不在push开关打开后获取push token为null
        // PushClient.getInstance(MyApplication.myApplicationContext).getRegId(new VivoMsgCallbackService());
    }
}

import android.text.TextUtils;

import com.vivo.push.listener.IPushQueryActionListener;

public class VivoMsgCallbackService implements IPushQueryActionListener {

    @Override
    public void onSuccess(String regid) {
        if (TextUtils.isEmpty(regid)) {
            LogUtils.LogD("vivo push service RegisterID is null: ");
        } else {
            LogUtils.LogD("vivo push service RegisterID: " + regid);
            // 拿到RegisterID
        }
    }

    @Override
    public void onFail(Integer integer) {
        LogUtils.LogD("vivo push service Register failed: " + integer.toString());

    }
}