该应用程序只是不会移动到登录页面，错误指向我内置的文档
04-14 22：10：48.482 4206-4206 / com.onyebuchboss.bossweatherbitcoinapp E / StorageHelpers：版本无价值 org.json.JSONException：版本没有值 at org.json.JSONObject.get（JSONObject.java:389） 在org.json.JSONObject.getString（JSONObject.java:550） 在com.google.firebase.auth.internal.zzz.zzc（未知来源） 在com.google.firebase.auth.internal.zzz.zzbi（未知来源） 在com.google.firebase.auth.FirebaseAuth。（未知来源） 在com.google.firebase.auth.FirebaseAuth。（未知来源） 在com.google.firebase.auth.internal.zzj。（未知来源） 在com.google.firebase.auth.FirebaseAuth.zza（未知来源） 在com.google.firebase.auth.FirebaseAuth.getInstance（未知来源） at java.lang.reflect.Method.invoke（Native Method） 在com.google.firebase.FirebaseApp.zza（未知来源） 在com.google.firebase.FirebaseApp.zzc（未知来源） 在com.google.firebase.FirebaseApp.initializeApp（未知来源） 在com.google.firebase.FirebaseApp.initializeApp（未知来源） 在com.google.firebase.FirebaseApp.initializeApp（未知来源） 在com.google.firebase.provider.FirebaseInitProvider.onCreate（未知来源） 在android.content.ContentProvider.attachInfo（ContentProvider.java:1748） 在android.content.ContentProvider.attachInfo（ContentProvider.java:1723） 在com.google.firebase.provider.FirebaseInitProvider.attachInfo（未知来源） 在android.app.ActivityThread.installProvider（ActivityThread.java:5153） 在android.app.ActivityThread.installContentProviders（ActivityThread.java:4748） 在android.app.ActivityThread.handleBindApplication（ActivityThread.java:4688） 在android.app.ActivityThread.-wrap1（ActivityThread.java） 在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1405） 在android.os.Handler.dispatchMessage（Handler.java:102） 在android.os.Looper.loop（Looper.java:148） 在android.app.ActivityThread.main（ActivityThread.java:5417） at java.lang.reflect.Method.invoke（Native Method） 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）
我的代码
public class WeatherActivity extends AppCompatActivity {
final int REQUEST_CODE = 123;
//the openweather url to be used
final String WEATHER_URL = "http://api.openweathermap.org/data/2.5/weather";
//the API key
final String APP_ID = "c9e6cb73daaf09d1bf0d1502d964bf60";
//time between location update (5000 milliseconds or 5 seconds)
final long MIN_TIME = 5000;
//Distance between location in metres
final float MIN_DISTANCE = 1000;
final String TAG = "WeatherApp";
//For the app to detect the user's location,
//we set the LOCATION_PROVIDER
String LOCATION_PROVIDER = LocationManager.GPS_PROVIDER;
//declare the variables to be linked to the layout
TextView mTemperature;
TextView mCity;
ImageView mWeatherImage;
//declare the LocationListener and LocationManager
LocationManager mLocationManager;
LocationListener mLocationListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.weather_layout);
//Link the elements in the Layout here
mCity = (TextView) findViewById(R.id.locationFetching);
mTemperature = (TextView) findViewById(R.id.tempereatureView);
mWeatherImage = (ImageView) findViewById(R.id.weatherImage);
ImageButton ChangeCityButton = (ImageButton) findViewById(R.id.changeCityButton);
//The Intent method used below is mostly used for switching between Activities
ChangeCityButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent changeCityIntent = new Intent(WeatherActivity.this, ChangeCityController.class);
// finish();
startActivity(changeCityIntent);
}
});
}
//the onResume method is one of android lifecycle method
//that starts/execute after the onCreate method
@Override
protected void onResume() {
super.onResume();
//retrieving the city name passed in the
//ChangecityController
//City was used in the PutExtra method in changeCity
Intent myIntent = getIntent();
String city =myIntent.getStringExtra("City");
//if the user does not enter a particular city
//retrieve user current city
if(city != null) {
getWeatherForNewLocation(city);
} else {
getWeatherForCurrentLocation();
}
}
//The method to retrieve any city entered by the user
private void getWeatherForNewLocation(String city) {
//the request params passes in the required parameters to retrieve data using the API
//The openWeatherMap API being used in this project, "q" and acity's name
//is to be assigned to iy
RequestParams params = new RequestParams();
params.put("q", city);
params.put("appid", APP_ID);
networkingCalls(params);
}
// get weather situation for current city -getWeatherForCurrentCityHere()
private void getWeatherForCurrentLocation() {
//create an instance of LocationManager
mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//the Location listener does the checking of the location for update
mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.d(TAG, "onLocationChanged: callback received");
//get the longitude and latitude of current locaion
//stored as a string
String Longitude = String.valueOf(location.getLongitude());
String Latitude = String.valueOf(location.getLatitude());
Log.d(TAG, "onLocation Latitude is: " + Latitude);
Log.d(TAG, "onLocationChanged: longitude " + Longitude);
RequestParams params = new RequestParams();
params.put("lat", Latitude);
params.put("lon", Longitude);
params.put("appid", APP_ID);
networkingCalls(params);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
Log.d(TAG, "onProviderDisabled: callback");
}
};
//REQUEST A LOCATION UPDATE PASSING THE LOCATION PROVIDER TO BE USED, MIN TIME,
// MIN DISTANCE AND mLISTENER as the receiver
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
//request permissions to use the user's device GPS
ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.ACCESS_FINE_LOCATION},REQUEST_CODE);
return;
}
mLocationManager.requestLocationUpdates(LOCATION_PROVIDER, MIN_TIME, MIN_DISTANCE, mLocationListener);
}
//the override method below gives the result of the
// permission request to use the user's GPS
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
//check to see if the request code matches the Request Code we gave
//during the request
if(requestCode == REQUEST_CODE){
if(grantResults.length> 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Log.d(TAG, "onRequestPermissionsResult(): Granted!");
getWeatherForCurrentLocation();
}else{
Log.d(TAG, "onRequestPermissionsResult: Permission Denied");
}
}
}
//create the networkingCalls method here
//this method, we implement an HttpRequest, using it to make a Get request
private void networkingCalls(RequestParams params){
AsyncHttpClient client = new AsyncHttpClient();
//the Json object handler is used to notify whether the Getrequest failed or was successful
//the json response hanler receive 2 messages - onSucess and onFailure
//both methods are declared below
client.get(WEATHER_URL, params, new JsonHttpResponseHandler(){
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response){
Log.d(TAG, "onSuccess: " + response.toString());
// call the json from the WeatherDataModel
WeatherDataModel weatherData = WeatherDataModel.fromJson(response);
updateUI(weatherData);
}
@Override
public void onFailure(int statuscode, Header[] headers, Throwable e, JSONObject response){
Log.e(TAG, "onFailure: "+ e.toString());
Log.d(TAG, "Status code: " + statuscode);
Toast.makeText(WeatherActivity.this, "Request failed", Toast.LENGTH_SHORT).show();
}
});
}
private void updateUI(WeatherDataModel weather){
mTemperature.setText(weather.getTemperature());
mCity.setText(weather.getCity());
int resourceID = getResources().getIdentifier(weather.getIconname(), "drawable", getPackageCodePath());
mWeatherImage.setImageResource(resourceID);
}
//This code below frees up memory
//when mListener is not in use and it is automatically generated
@Override
protected void onPause() {
super.onPause();
if(mLocationManager != null) mLocationManager.removeUpdates(mLocationListener);
}
}
public class WeatherDataModel {
private String mTemperature;
private String mCity;
private String mIconname;
private int mCondition;
//create a weatherdatamodel fromJson:
public static WeatherDataModel fromJson(JSONObject jsonObject) {
WeatherDataModel weatherData = new WeatherDataModel();
//we surround the json parsing code with a try-catch statement
//to handle errors like nan and empty values
try {
//get json object called -id, that is nested oin an object "0", thats also nested in an array called weather
weatherData.mCondition = jsonObject.getJSONArray("weather").getJSONObject(0).getInt("id");
weatherData.mCity = jsonObject.getString("name");
weatherData.mIconname = updateWeatherIcon(weatherData.mCondition);
double temp = jsonObject.getJSONObject("main").getDouble("temp") - 273.15;
int rdValue = (int) Math.rint(temp);
weatherData.mTemperature= Integer.toString(rdValue);
return weatherData;
}catch (JSONException e){
e.printStackTrace();
return null;
}
}
private static String updateWeatherIcon(int condition) {
if (condition >= 0 && condition < 300) {
return "tstorm1";
} else if (condition >= 300 && condition < 500) {
return "light_rain";
} else if (condition >= 500 && condition < 600) {
return "shower3";
} else if (condition >= 600 && condition <= 700) {
return "snow4";
} else if (condition >= 701 && condition <= 771) {
return "fog";
} else if (condition >= 772 && condition < 800) {
return "tstorm3";
} else if (condition == 800) {
return "sunny";
} else if (condition >= 801 && condition <= 804) {
return "cloudy2";
} else if (condition >= 900 && condition <= 902) {
return "tstorm3";
} else if (condition == 903) {
return "snow5";
} else if (condition == 904) {
return "sunny";
} else if (condition >= 905 && condition <= 1000) {
return "tstorm3";
}
return "dunno";
}
//create a Get() for the variable created, so it can be retrieved in the weatherActivity
public String getTemperature() {
return mTemperature + "°";
}
public String getCity() {
return mCity;
}
public String getIconname() {
return mIconname;
}
}
答案 0 :(得分：0)
首先尝试检查JSON对象是否存在：
public function store(Request $request)
{
/*$this->validate(
$request,
[
'name'=>'required|string|unique:books,book_name|max:30',
'writer'=>'required|string|max:30',
'publisher_name'=>'required|string|max:30',
'publisher_date'=>'required',
'description'=>'required',
'pages_num'=>'required|integer|between:1,5000',
'image'=>'required'
]
);
$user =new books;
$user->book_name=Input::get("name");
$user->writer=Input::get("writer");
$user->publisher_name=Input::get("publisher_name");
$user->publisher_date=Input::get("publisher_date");
$user->description=Input::get("description");
$user->pages_num=Input::get("pages_num");
$user->image=input::get("image")
$user->save();
}
答案 1 :(得分：0)
使用Firebase SDK 15.0.0（released April 10）构建后，我看到相同的堆栈跟踪，但消息略有不同：
org.json.JSONException: No value for userMetadata
对我来说，异常是非致命的，只会在第一次在设备上运行新版本时发生。我认为可以忽略它。
如果您反复看到错误或导致问题，请降级到Firebase 12.0.1。