retrofitResponse方法中的循环不会循环，它应该这样做。假设从谷歌地图网址获取json数据。
package com.webstarts.byteglory.shomadhan;
import android.*;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.location.Location;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.webstarts.byteglory.shomadhan.POJO.Example;
import retrofit.Call;
import retrofit.Callback;
import retrofit.GsonConverterFactory;
import retrofit.Response;
import retrofit.Retrofit;
public class StartActivity extends FragmentActivity implements ConnectionCallbacks, OnConnectionFailedListener, com.google.android.gms.location.LocationListener, OnMapReadyCallback {
protected GoogleApiClient mGoogleApiClient;
protected Location mLastLocation;
protected static final String TAG = "Location Services Test";
private Button search_location_button;
private Button search_area_button;
private Button toilet_status_button;
protected LatLng latlng;
protected LocationRequest mLocationRequest;
private GoogleMap mMap;
private int PROXIMITY_RADIUS = 10000;
Marker mCurrLocationMarker;
boolean mapReady = false;
private Marker mPerth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start);
search_location_button = (Button) findViewById(R.id.search_location_button);
search_area_button = (Button) findViewById(R.id.search_area_button);
toilet_status_button = (Button) findViewById(R.id.toilet_status_button);
locationApiClient();
// SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
// .findFragmentById(R.id.map);
// mapFragment.getMapAsync(this);
search_location_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Log.i(TAG, String.valueOf(latlng.latitude));
// Uri gmmIntentUri = Uri.parse("geo:"+String.valueOf(latlng.latitude)+","+String.valueOf(latlng.longitude)+"?z=15&q=public toilets");
// Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
// mapIntent.setPackage("com.google.android.apps.maps");
// startActivity(mapIntent);
retrofitResponse();
// Marker loc = mMap.addMarker(new MarkerOptions().position(latlng)
// .title("You are here now 23"));
// mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latlng, 15));
//
// // Zoom in, animating the camera.
// mMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
// Log.i(TAG, String.valueOf(latlng.latitude));
}
});
MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
protected synchronized void locationApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
if (mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
}
/**
* Runs when a GoogleApiClient object successfully connects.
*/
@Override
public void onConnected(Bundle connectionHint) {
// Provides a simple way of getting a device's location and is well suited for
// applications that do not require a fine-grained location and that do not need location
// updates. Gets the best and most recent location currently available, which may be null
// in rare cases when a location is not available.
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(1000);
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.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.
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLastLocation != null) {
latlng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
}
else {
Toast toast = Toast.makeText(this, "Turn on your location service", Toast.LENGTH_LONG);
toast.show();
finish();
}
}
public void onLocationChanged(Location location) {
}
@Override
public void onConnectionFailed(ConnectionResult result) {
// Refer to the javadoc for ConnectionResult to see what error codes might be returned in
// onConnectionFailed.
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + result.getErrorCode());
}
/*
* Called by Google Play services if the connection to GoogleApiClient drops because of an
* error.
*/
public void onDisconnected() {
Log.i(TAG, "Disconnected");
}
@Override
public void onConnectionSuspended(int cause) {
// The connection to Google Play services was lost for some reason. We call connect() to
// attempt to re-establish the connection.
Log.i(TAG, "Connection suspended");
mGoogleApiClient.connect();
}
private void retrofitResponse() {
String url = "https://maps.googleapis.com/maps/";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create())
.build();
RetrofitMaps service = retrofit.create(RetrofitMaps.class);
Call<Example> call = service.getNearbyPlaces("restaurents", latlng.latitude + "," + latlng.longitude, PROXIMITY_RADIUS);
call.enqueue(new Callback<Example>() {
@Override
public void onResponse(Response<Example> response, Retrofit retrofit) {
try {
mMap.clear();
// This loop will go through all the results and add marker on each location.
Log.i("ishan", String.valueOf(response.body().getResults().size()));
for (int i = 0; i < response.body().getResults().size(); i++) {
Double lat = response.body().getResults().get(i).getGeometry().getLocation().getLat();
Double lng = response.body().getResults().get(i).getGeometry().getLocation().getLng();
String placeName = response.body().getResults().get(i).getName();
String vicinity = response.body().getResults().get(i).getVicinity();
MarkerOptions markerOptions = new MarkerOptions();
LatLng latLng = new LatLng(lat, lng);
// Position of Marker on Map
markerOptions.position(latLng);
// Adding Title to the Marker
markerOptions.title(placeName + " : " + vicinity);
// Adding Marker to the Camera.
Marker m = mMap.addMarker(markerOptions);
// Adding colour to the marker
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
// move map camera
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
Log.i("ishan", String.valueOf(i));
}
} catch (Exception e) {
Log.d("onResponse", "There is an error");
e.printStackTrace();
}
}
@Override
public void onFailure(Throwable t) {
Log.d("onFailure", t.toString());
}
});
}
@Override
public void onMapReady(GoogleMap map) {
mapReady=true;
mMap = map;
// //Initialize Google Play Services
// if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// if (ContextCompat.checkSelfPermission(this,
// android.Manifest.permission.ACCESS_FINE_LOCATION)
// == PackageManager.PERMISSION_GRANTED) {
// }
// }
}
}
这是改造的界面。它只有GET，因为它只是从地图URL中读取数据。
package com.webstarts.byteglory.shomadhan;
import com.webstarts.byteglory.shomadhan.POJO.Example;
import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Query;
public interface RetrofitMaps {
/*
* Retrofit get annotation with our URL
* And our method that will return us details of student.
*/
@GET("api/place/nearbysearch/json?sensor=true&key=AIzaSyABCGHHSFDGSDsdfGADFnM")
Call<Example> getNearbyPlaces(@Query("type") String type, @Query("location") String location, @Query("radius") int radius);
}
答案 0 :(得分：0)
我刚刚在onResponse改造功能中循环，如下所示： public void onResponse（来电，回应回复）{
/* implement the toast */
/* =new ArrayList<User>(); */
ArrayList<User> test;
test=response.body().getUsers();
String jax= test.get(0).getFarm_name();
//Toast.makeText(MarkerDemoActivity.this, "farm name is "+jax, Toast.LENGTH_LONG).show();
//LatLng m_cord,String farm_name,String desc
int i = 0;
while ( test.size()>i) {
String farm_name = test.get(i).getFarm_name();
String desc1 = test.get(i).getOwner_tel();
String desc2 = test.get(i).getFarm_type();
String cords = test.get(i).getM_cord();
//split the co-ords
String[] latlong = cords.split(",");
double latitude = Double.parseDouble(latlong[0]);
double longitude = Double.parseDouble(latlong[1]);
LatLng location = new LatLng(latitude, longitude);
//do the loop here
// Add lots of markers to the map. LatLng m_cord,String farm_name,String desc
addMarkersToMapJax(location, farm_name, desc1 + desc2);
i++;
}
}
我创建了一个标记函数来加载坐标：
private void addMarkersToMapJax(LatLng m_cord,String farm_name,String desc) {
// Uses a colored icon.
mArc = mMap.addMarker(new MarkerOptions()
.position(m_cord)
.title(farm_name)
.snippet(desc)