我正在使用谷歌地图。我想我正确地获得了Lat / Long对 - 即我试图在地图上显示的坐标 - 它们在我的SignIn类中正确更新。
我还有一个Map课程，我希望能够从SignIn课程中获取更新后的坐标。但是，当前获取GPS坐标的尝试始终返回我已经硬编码到SignIn类中的默认值。
如何从SignIn课程中的Map课程中获取更新后的值？
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.SingleClientConnManager;
import org.apache.http.message.BasicNameValuePair;
import com.google.android.gms.maps.model.LatLng;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.provider.OpenableColumns;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class SignIn extends Fragment {
Context context_frag1;
HttpPost httppost;
StringBuffer buffer;
HttpResponse Response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
Intent intent;
protected Context context;
Button b;
Button sendBtn;
//String m_username,m_password;
ProgressDialog dialog = null;
public double latitude = 32.3234;// these values are getting my other class always but i update them down here y it getting these
public double longitude = 72.456;
EditText username,password;
public SignIn() { }
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_layout_two,container, false);
b = (Button)view.findViewById(R.id.button1);
username = (EditText)view.findViewById(R.id.username);
password = (EditText)view.findViewById(R.id.password);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new Thread(new Runnable() {
public void run() {
login();
}
}).start();
}
});
return view;
}
@SuppressWarnings("deprecation")
void login(){
while(true){
try{
httpclient=new DefaultHttpClient();
httppost= new HttpPost("my web adderss");
nameValuePairs = new ArrayList<NameValuePair>(1);
// Always use the same variable name for posting i.e the android side variable name and php side variable name should be similar,
nameValuePairs.add(new BasicNameValuePair("username",m_username.getText().toString().trim()));
nameValuePairs.add(new BasicNameValuePair("password",m_password.getText().toString().trim()));
//nameValuePairs.add(new BasicNameValuePair("id",m_id.getText().toString().trim()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
Response=httpclient.execute(httppost);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(httppost, responseHandler);
System.out.println("Response : " + response);
// delay to send loactions
getActivity().runOnUiThread(new Runnable() {
public void run() {
try{
String strn = response.replaceAll("[a-zA-Z//:]", "");
String[] parts = strn.split(",");// this will separte lat lng where it get ,
String part1 = parts[0];
String part2 = parts[1];
latitude = Double.parseDouble(part1);
longitude = Double.parseDouble(part2);
//here i get lat and lng these are updating dynamically
Toast.makeText(getActivity().getApplicationContext(), ""+latitude +""+ longitude, Toast.LENGTH_LONG).show();
} catch (ArrayIndexOutOfBoundsException e) {
Toast.makeText(getActivity().getApplicationContext(), "ArrayIndexOutOfBoundsException", Toast.LENGTH_LONG).show();
}
try {
Response.getEntity().consumeContent();
httpclient.getConnectionManager().closeExpiredConnections();
httpclient.getConnectionManager().shutdown();
} catch (IOException e) {
Toast.makeText(getActivity().getApplicationContext(), "IOException", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
});
}catch(Exception e){
//dialog.dismiss();
Log.i("catch", "i got exception here", e);
}
}
}
}
现在我有其他地图类，我想要这些lat lng
> import com.google.android.gms.common.ConnectionResult;
> import com.google.android.gms.common.GooglePlayServicesUtil;
> import com.google.android.gms.common.api.GoogleApiClient;
> import com.google.android.gms.location.FusedLocationProviderApi;
> import com.google.android.gms.location.LocationListener;
> import com.google.android.gms.location.LocationRequest;
> import com.google.android.gms.location.LocationServices;
> import com.google.android.gms.maps.CameraUpdate;
> import com.google.android.gms.maps.CameraUpdateFactory;
> import com.google.android.gms.maps.GoogleMap;
> import com.google.android.gms.maps.MapView;
> import com.google.android.gms.maps.SupportMapFragment;
> import com.google.android.gms.maps.model.BitmapDescriptorFactory;
> import com.google.android.gms.maps.model.CameraPosition;
> 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 android.app.Dialog; import android.content.Intent;
> import android.location.Location; import android.os.Bundle;
> import android.support.v4.app.FragmentActivity;
> import android.util.Log;
> import android.view.Menu; import android.view.MenuItem;
> import android.widget.Toast;
>
> public class Map extends FragmentActivity implements
> GoogleApiClient.ConnectionCallbacks,
> GoogleApiClient.OnConnectionFailedListener, LocationListener{
>
> private static final int GPS_ERRORDIALOG_REQUEST = 9001;
> GoogleMap mMap;
> //MapView vMap;
> Marker marker;
>
>
> private LocationRequest mLocationRequest;
> private GoogleApiClient mGoogleApiClient;
> //private MarkerOptions option1;
>
> private static final float Zoom =12; public String TITLE = "Me"; private static final String TAG = "My map";
> FusedLocationProviderApi mLocationClient;
>
> int zoom=13;
> @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
> if (servicesOK()) {
> setContentView(R.layout.activity_map); //vMap = (MapView)findViewById(R.id.mapview);
> //vMap.onCreate(savedInstanceState);
> if(initMap()){
> Toast.makeText(this, "Ready to map!", Toast.LENGTH_SHORT).show();
>
> mGoogleApiClient = new GoogleApiClient.Builder(this)
> .addApi(LocationServices.API)
> .addConnectionCallbacks(this)
> .addOnConnectionFailedListener(this)
> .build();
>
> mGoogleApiClient.connect();
>
> new Thread(new Runnable() {
> public void run() {
> Vanlocation();
> }
>
> }).start();
>
> }else{
> Toast.makeText(this, "Map not available !", Toast.LENGTH_SHORT).show(); }
> } else{
>
> setContentView(R.layout.activity_main); } }
>
> public boolean onCreateOptionsMenu(Menu menu) { // Inflate the
> menu; this adds items to the action bar if it is present.
> getMenuInflater().inflate(R.menu.main, menu);
> return true; } public boolean servicesOK() { int isAvailable =
> GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
> if (isAvailable == ConnectionResult.SUCCESS) { return true; } else if
> (GooglePlayServicesUtil.isUserRecoverableError(isAvailable)) {
> Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable,
> this, GPS_ERRORDIALOG_REQUEST); dialog.show(); } else {
> Toast.makeText(this, "Can't connect to Google Play services",
> Toast.LENGTH_SHORT).show(); } return false;
> } private void Vanlocation() {
> while(true){
> try{
>
> runOnUiThread(new Runnable() {
>
> public void run() {
>
> if(marker!=null){
> marker.remove();
> }
> // here i want those update value but i just get default values
> signIn ll = new signIn();
> double lat=ll.lat;
> double lng=ll.lng;
> gotoLocation(lat , lng , zoom);
>
>
>
>
> }
> });
> Thread.sleep(2500);
>
> }catch(Exception e){
>
> System.out.println("Exception : " + e.getMessage());
> }
>
> }
> } private boolean initMap() { if(mMap == null){ SupportMapFragment mapFrag =
> (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); mMap =
> mapFrag.getMap(); mMap.setMyLocationEnabled(true);
> mMap.getUiSettings().setZoomControlsEnabled(true);
> mMap.getUiSettings().setMyLocationButtonEnabled(true); //
> gotoLocation(lat , lng , zoom);
> }
> return (mMap != null); } private void gotoLocation(double lat , double lng , float zoom){ LatLng ll = new LatLng(lat, lng);
> CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, zoom);
> mMap.animateCamera(update); String t="van"; setMarker(t,
> ll.latitude, ll.longitude); } @Override public boolean
> onOptionsItemSelected(MenuItem item) {
> return super.onOptionsItemSelected(item); }
>
>
> @Override
> protected void onStart() {
> super.onStart();
> // Connect the client.
> mGoogleApiClient.connect();
> }
>
> @Override protected void onStop() { super.onStop();
> MapStateManager mgr = new MapStateManager(this);
> mgr.saveMapState(mMap, marker);
>
> if(mGoogleApiClient.isConnected()) {
> mGoogleApiClient.disconnect();
> }
> }
> @Override protected void onResume() { super.onResume(); MapStateManager mgr = new MapStateManager(this); CameraPosition
> position =mgr.getSavedCameraPosition(mMap); MarkerOptions m =
> mgr.getmarker(mMap);
>
> if(position !=null){ CameraUpdate update = CameraUpdateFactory.newCameraPosition(position);
> mMap.moveCamera(update); mMap.setMapType(mgr.getSavedMapType());
>
> setMarker(m.getTitle(),m.getPosition().latitude,m.getPosition().longitude);
> //mMap.addMarker(m);
> } }
> private void setMarker(String locality, double lat, double lng) {
>
>
> MarkerOptions options = new MarkerOptions()
> .title(locality+lat+lng) .position(new LatLng(lat, lng))
> //.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_mapmarker));
> .icon(BitmapDescriptorFactory
> .defaultMarker(BitmapDescriptorFactory.HUE_BLUE)); marker =
> mMap.addMarker(options); }
> @Override public void onConnectionFailed(ConnectionResult arg0) {
>
> }
>
> @Override public void onConnected(Bundle arg0) {
>
> mLocationRequest = LocationRequest.create();
> mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
> mLocationRequest.setInterval(1000); // Update location every second
>
> LocationServices.FusedLocationApi.requestLocationUpdates(
> mGoogleApiClient, mLocationRequest, this);
> }
> @Override public void onConnectionSuspended(int arg0) {
> Log.i(TAG, "GoogleApiClient connection has been suspend");
> }
>
> @Override public void onLocationChanged(Location location) {
> //String msg ="Location: " + location.getLatitude() + "," +
> location.getLongitude(); //Toast.makeText(getApplicationContext(),
> msg, Toast.LENGTH_SHORT).show(); //LatLng ll = new
> LatLng(location.getLatitude(), location.getLongitude());
> //CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, zoom);
> //mMap.animateCamera(update); //String t="me"; //setMarker(t,
> ll.latitude, ll.longitude); }
>
>
> }
答案 0 :(得分：1)
我的错误是静态的 我应该在变量名称
之前使用word static我做了什么，我创建了另一个类，它将保存所有类将获取它们的静态变量。
public class gpsLatLng {
public static double lat;
public static double lng;
}
但我得到的问题是，当循环运行时，我得到一次正确的值，我得到相同的值未更新，但值正在定期更新
答案 1 :(得分：1)
如果您想删除内存泄漏，还可以使用LocalBroadCast向其他活动发送消息。
<强> ReceiverActivity.java
此活动将等待任何名为your-custom-event-name的事件发生。
@Override
public void onCreate(Bundle savedInstanceState) {
...
// Register to receive messages.
// We are registering an observer (mMessageReceiver) to receive Intents
// with actions named "custom-event-name".
LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
new IntentFilter("your-custom-event-name"));
}
// Our handler for received Intents. This will be called whenever an Intent
// with an action named "custom-event-name" is broadcasted.
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {@Override
public void onReceive(Context context, Intent intent) {
// Get extra data included in the Intent
String lat = intent.getStringExtra("lat");
String lng = intent.getStringExtra("lat");
Log.d("receiver", "Got lat : " + lat + " lgn : "+lng);
}
};
@Override
protected void onDestroy() {
// Unregister since the activity is about to be closed.
LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
super.onDestroy();
}
<强> SenderActivity.java
使用以下简短代码将任何类型的数据发送到其他活动
Intent intent = new Intent("your-custom-event-name");
// You can also include some extra data.
intent.putExtra("lat", "1");
intent.putExtra("lng", "5");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);