在此代码中，我解释了如何以JSON格式将数据发送到服务器。它使用" requestParams"将数据发送到服务器，并以" JSONOBJECT响应"中的JSON格式从服务器中获取响应。
////////获取位置////////////////
Location location;
private Location getLocation() {
if (isNetworkAvailable( this )) {
LocationManager locationManager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );
if (locationManager != null) {
boolean gps_enabled = locationManager.isProviderEnabled( LocationManager.GPS_PROVIDER );
boolean network_enabled = locationManager.isProviderEnabled( LocationManager.NETWORK_PROVIDER );
if (ContextCompat.checkSelfPermission( NearMeActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText( NearMeActivity.this, "Turn on location permission", Toast.LENGTH_SHORT ).show();
} else {
if (network_enabled) {
locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, 5000, 10, this );
location = locationManager.getLastKnownLocation( LocationManager.NETWORK_PROVIDER );
return location;
} else if (gps_enabled) {
locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 5000, 10, this );
location = locationManager.getLastKnownLocation( LocationManager.GPS_PROVIDER );
return location;
}
}
}
} else {
Toast.makeText( NearMeActivity.this, R.string.isOnline, Toast.LENGTH_SHORT ).show();
}
return null;
}
public void submitBtn(View view) {
if (isNetworkAvailable( this )) {
if (location != null) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.put( "latitude", latitude );
params.put( "longitude", longitude );
String uploadURL = "192.168.1.106";
client.post( uploadURL, params, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
try {
String status = response.getString( "status" );
String msg = response.getString( "msg" );
//Toast.makeText( getApplicationContext(), status, Toast.LENGTH_SHORT ).show();
if (status.equals( "success" )) {
Toast.makeText( getApplicationContext(), msg, Toast.LENGTH_SHORT ).show();
} else if (status.equals( "failed" )) {
Toast.makeText( getApplicationContext(), msg, Toast.LENGTH_SHORT ).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
//Toast.makeText( getApplicationContext(), R.string.onFailure, Toast.LENGTH_SHORT ).show();
}
@Override
public void onStart() {
progressBar.setVisibility( View.VISIBLE );
System.out.println( "onStart" );
}
@Override
public void onFinish() {
progressBar.setVisibility( View.INVISIBLE );
System.out.println( "onFinish" );
}
} );
} else {
Toast.makeText( this, "Getting your current location...", Toast.LENGTH_SHORT ).show();
}
} else {
Toast.makeText( this, R.string.isOnline, Toast.LENGTH_SHORT ).show();
}
}
///////检查网络连接///////////////////////////////////////////////
private static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService( Context.CONNECTIVITY_SERVICE );
if (connectivity == null) {
Log.d( "NetworkCheck", "isNetworkAvailable: No" );
return false;
}
// get network info for all of the data interfaces (e.g. WiFi, 3G, LTE, etc.)
NetworkInfo[] info = connectivity.getAllNetworkInfo();
// make sure that there is at least one interface to test against
if (info != null) {
// iterate through the interfaces
for (NetworkInfo anInfo : info) {
// check this interface for a connected state
if (anInfo.getState() == NetworkInfo.State.CONNECTED) {
Log.d( "NetworkCheck", "isNetworkAvailable: Yes" );
return true;
}
}
}
return false;
}
这个问题中有三个部分。第1部分：从设备获取位置。第2部分：将数据发送到服务器第3部分：在服务器中接收该数据。对于第1部分，如何在Android中获得移动设备的纬度和经度？请按照此链接第2部分：
AsyncHttpClient client=new AsyncHttpClient();
RequestParams requestParams=new RequestParams();
String lati=latitude.getText().toString();
String longi=longitude.getText().toString();
requestParams.put("Latitude",lati);
requestParams.put("Logitude",longi);
client.post("http://192.168.1.109/LocationApp.json",new JsonHttpResponseHandler(){
@Override
public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
//receive the response from server here
}
@Override
public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
super.onFailure(statusCode, headers, responseString, throwable);
}
});
第3部分：在服务器端使用这样的代码（请注意，此代码适用于JSP）
String latitude=request.getParameter("Latitude");
String longitude=request.getParameter("longitude");
根据活动和接收器使用此代码在这里，" liveLocationResp"是我的API响应，" liveLocationReq"是我的API请求致电您的API而不是" apis apis = retrofitClient.getServices（your_url）; 调用liveupload = apis.liveLocation（livelocationreq）;"
并将您的结果加油并获取数据，这是我的工作代码在这里，每个位置更改事件您都会将当前的LANG上传到服务器
public class Your_Activity extends AppCompatActivity {
private static final String TAG = "YOUR_ACTIVITY";
public static final int LOCATION_UPDATE_MIN_DISTANCE = 10;
public static final int LOCATION_UPDATE_MIN_TIME = 5000;
private LocationManager mLocationManager;
public static Double latitude = 0.0;
public static Double longitude = 0.0;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_activity);
runOnUiThread(new Runnable() {
@Override
public void run() {
mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
getCurrentLocation();
}
});
}
private LocationListener mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
if (location != null & wayPoints!=null && wayPoints.size()!=0) {
Calendar calendar = Calendar.getInstance();
String currentDateTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
latitude = location.getLatitude();
longitude = location.getLongitude();
Log.e("LOCATION UP",String.format("%f, %f", location.getLatitude(), location.getLongitude()));
Intent intent = new Intent(Your_Activity .this,LiveLocationUploadReceiver.class);
sendBroadcast(intent);
} else {
Log.e("LOCATION","Location is null");
}
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
};
@SuppressLint("MissingPermission")
private void getCurrentLocation() {
boolean isGPSEnabled = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean isNetworkEnabled = mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Location location = null;
if (!(isGPSEnabled || isNetworkEnabled)){
} else {
if (isNetworkEnabled) {
mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
LOCATION_UPDATE_MIN_TIME, LOCATION_UPDATE_MIN_DISTANCE, mLocationListener);
location = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
if (isGPSEnabled) {
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
LOCATION_UPDATE_MIN_TIME, LOCATION_UPDATE_MIN_DISTANCE, mLocationListener);
location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
}
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
Log.e("LOCATIONS",String.format("getCurrentLocation(%f, %f)", location.getLatitude(),
location.getLongitude()));
}
}
}
public class LiveLocationUploadReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
LiveLocationreq liveLocationreq = new LiveLocationreq();
liveLocationreq.setLatitude(DemoRouteApi.latitude+"");
liveLocationreq.setLongitude(DemoRouteApi.longitude+"");
uploadLiveLocation(liveLocationreq);
}
private void uploadLiveLocation(LiveLocationreq liveLocationreq){
Apis apis = RetroFitClient.getservices(YOUR_URL);
Call<LiveLocationResp> liveUpload = apis.liveLocation(liveLocationreq);
liveUpload.enqueue(new Callback<LiveLocationResp>() {
@Override
public void onResponse(Call<LiveLocationResp> call, Response<LiveLocationResp> response) {
String str = new Gson().toJson(response.body());
Log.e(TAG,str);
}
@Override
public void onFailure(Call<LiveLocationResp> call, Throwable t) {
return ;
}
});
}
}