求大神指导：Activity中setText显示为null，无法正常显示内容

未报错，内容显示为null，无法正确显示获取的内容

WeatherActivity代码显示如下：

public class WeatherActivity extends AppCompatActivity {
public DrawerLayout drawerLayout;
private Button navButton;

public SwipeRefreshLayout swipeRefresh;



private ScrollView weatherLayout;
private TextView titleCity;
private TextView titleUpdateTime;
private TextView degreeText;
private TextView weatherInfoText;
private LinearLayout forecastLayout;
private TextView aqiText;
private TextView pm25Text;
private TextView comfortText;
private TextView carWashText;
private TextView sportText;
private String mWeatherId;
private ImageView bingPicImg;

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_weather);
/**
 * 处理并展示Weather实体类中的数据
 */
private void showWeatherInfo(Weather weather){
    String cityName=weather.basic.cityName;
    String updateTime=weather.basic.update.updateTime.split(" ")[1];
    String degree=weather.now.temperature+"℃";
    String weatherInfo=weather.now.more.info;
    titleCity.setText(cityName);
    titleUpdateTime.setText(updateTime);
    degreeText.setText(degree);
    weatherInfoText.setText(weatherInfo);
    forecastLayout.removeAllViews();
    for (Forecast forecast:weather.forecastList){
        View view= LayoutInflater.from(this).inflate(R.layout.forecast_item,forecastLayout,false);
        TextView dataText=view.findViewById(R.id.date_text);
        TextView infoText=view.findViewById(R.id.info_text);
        TextView maxText=view.findViewById(R.id.max_text);
        TextView minText=view.findViewById(R.id.min_text);
        dataText.setText(forecast.date);
        infoText.setText(forecast.more.info);
        maxText.setText(forecast.temperature.max);
        minText.setText(forecast.temperature.min);
        forecastLayout.addView(view);
    }
    if (weather.aqi!=null){
        aqiText.setText(weather.aqi.city.aqi);
        pm25Text.setText(weather.aqi.city.pm25);
    }
    String comfort="舒适度:"+weather.suggestion.comfort.info;
    String carWash="洗车指数:"+weather.suggestion.carWash.info;
    String sport="运动建议:"+weather.suggestion.sport.info;
    comfortText.setText(comfort);
    carWashText.setText(carWash);
    sportText.setText(sport);
    weatherLayout.setVisibility(View.VISIBLE);
    Intent intent=new Intent(this, AutoUpdateService.class);
    startService(intent);
}

}

xml布局文件代码如下：
<?xml version="1.0" encoding="utf-8"?>
android:orientation="vertical"
android:layout_margin="15dp"
android:background="#8000"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="15dp"
    android:layout_marginTop="15dp"
    android:text="生活建议"
    android:textColor="#fff"
    android:textSize="20sp"/>

<TextView
    android:id="@+id/comfort_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="15dp"
    android:textColor="#fff"/>

<TextView
    android:id="@+id/car_wash_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="15dp"
    android:textColor="#fff"/>

<TextView
    android:id="@+id/sport_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="15dp"
    android:textColor="#fff"/>

GSON解析JSON代码如下：

public class Suggestion {
@SerializedName("comf")
public Comfort comfort;

@SerializedName("cw")
public CarWash carWash;

public Sport sport;

public class Comfort{
    @SerializedName("text")
    public String info;
}

public class CarWash{
    @SerializedName("text")
    public String info;
}

public class Sport{
    @SerializedName("text")
    public String info;
}

}

应该是得到的字符串“null”，而不是正的null，数据问题。
解决办法：
（1）
if("null".eques(forecast.date) || forecast.date == null) dataText.setText("");
else dataText.setText(forecast.date);

（2）数据实体别赋值“null”，后台数据控制或者数据实体中控制都可以。