通过从数据库下载位置值，可以在其上放置标记的地图。但只有在激活onResume()后才能直观显示。这是一种放置标记的方法
public void place(){
for (int i = 0; i<user_sex.length; i++){
//someone = new MarkerOptions().position(new LatLng(xx[i], yy[i])).title("Вы здесь!");
if (user_sex[i]==1){
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE)));
list.put(new LatLng(xx[i],yy[i]), i);
}
if (user_sex[i]==2){
//m[i]=map.addMarker(new MarkerOptions().title("Посмотреть").position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
list.put(new LatLng(xx[i],yy[i]), i);
}else{
if(xx[i]!=0 && yy[i]!=0 && (user_sex[i] < 1)){
//m[i]=map.addMarker(new MarkerOptions().title("Посмотреть").position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
list.put(new LatLng(xx[i],yy[i]), i);
}
}
//map.addMarker(someone);
}
}
但在这种情况下，我可以在不重新启动活动的情况下看到它们
CameraPosition cameraPosition = new CameraPosition.Builder().target(new LatLng(x, y)).zoom(16).build();
map.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
place();
this.onResume();
但是这个决定会导致管理卡出现问题 - 如果您移动相机，它会返回到该位置，并且当缩放时 - 返回缩放（16）。有解决方案吗？我的onResume（）在下面
@Override
protected void onResume(){
super.onResume();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
1000 * 10, 10, locationListener);
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 1000 * 10, 10,
locationListener);
checkEnabled();
}
以下全文MapActivity：
package com.pavloid21.vk;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.LinearLayout;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnInfoWindowClickListener;
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 com.pavloid21.vk.R;
import com.pavloid21.vk.ProfileActivity;
import com.sbstrm.appirater.Appirater;
import com.startad.lib.SADView;
public class MapActivity extends FragmentActivity{
SharedPreferences spref, mpref;
Editor editor;
Thread thrd;
boolean flag;
HttpResponse response = null;
String token_user;
int sex;
long usr;
long ID;
static double x, y, lastX, lastY;
static int count = 0;
SupportMapFragment mapFragment;
private LocationManager locationManager;
GoogleMap map;
Map<LatLng, Integer> list = new HashMap();
final String TAG = "myLogs";
private ProgressDialog pDialog;
long[] vkIDs;
int[] user_sex;
double[] xx;
double[] yy;
String[] name;
String[] m;
MarkerOptions someone;
String nm;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
vkIDs = new long[100];
user_sex = new int[100];
xx = new double[100];
yy = new double[100];
name = new String[100];
locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
map = mapFragment.getMap();
if (map == null) {
finish();
return;
}
}
@Override
protected void onResume(){
super.onResume();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
1000 * 10, 10, locationListener);
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 1000 * 10, 10,
locationListener);
checkEnabled();
}
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(locationListener);
}
private LocationListener locationListener = new LocationListener(){
@Override
public void onLocationChanged(Location location) {
showLocation(location);
}
@Override
public void onProviderDisabled(String provider) {
checkEnabled();
}
@Override
public void onProviderEnabled(String provider) {
checkEnabled();
showLocation(locationManager.getLastKnownLocation(provider));
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
if (provider.equals(LocationManager.GPS_PROVIDER)) {
Log.d("loction CHECK","Status: GPS "+ String.valueOf(status));
} else if (provider.equals(LocationManager.NETWORK_PROVIDER)) {
Log.d("loction CHECK","Status: NET "+ String.valueOf(status));
}
}
};
private void showLocation(Location location) {
if (location == null)
return;
if (location.getProvider().equals(LocationManager.GPS_PROVIDER)) {
Log.d("loction CHECK","Status: GPS "+ formatLocation(location));
} else if (location.getProvider().equals(
LocationManager.NETWORK_PROVIDER)) {
Log.d("loction CHECK","Status: NET "+ formatLocation(location));
}
x = location.getLatitude();
y = location.getLongitude();
MarkerOptions marker = new MarkerOptions().position(new LatLng(x, y)).title("Вы здесь!");
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
Appirater.appLaunched(this);
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener(){
@Override
public void onInfoWindowClick(Marker marker) {
if (list.containsKey(marker.getPosition())){
int i = list.get(marker.getPosition());
Intent intent = new Intent(MapActivity.this,ProfileActivity.class);
ProfileActivity.setID(vkIDs[i]);
startActivity(intent);
}
}
});
if (count < 1) {
map.addMarker(marker);
mpref = getSharedPreferences("pref", Context.MODE_PRIVATE);
flag = mpref.getBoolean("geo", true);
if(flag == true){
new Thread(new Runnable() {
@Override
public void run(){
DefaultHttpClient hc = new DefaultHttpClient();
ResponseHandler<String> res = new BasicResponseHandler();
spref = getSharedPreferences("SETTING", Context.MODE_PRIVATE);
if (spref.contains("IDUSER")){
usr = spref.getLong("IDUSER", 0);
nm = spref.getString("NAME", "");
sex = spref.getInt("SEX", 0);
//token_user = spref.getString("TOKEN", "");
//sex = spref.getInt("SEX", 0);
//nm = spref.getString("NAME", "");
}
HttpGet http;
http = new HttpGet("http://hdwallpapers.orisale.ru//set_mylocation.php?vkid="+usr+"&name="+nm+"&sex="+sex+"&x="+ x +"&y="+ y);
Log.d("SEX!!!!!!!!!!!!!!!!", ""+sex);
try {
String response = hc.execute(http, res);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
} else {}
Thread getPeopleThrd = new Thread(new Runnable(){
@Override
public void run(){
JSONParser jsonParser = new JSONParser();
JSONObject json = jsonParser.getJSONFromUrl("http://hdwallpapers.orisale.ru//get_around.php?&x="+ x +"&y="+ y);
JSONArray array = null;
try {
array = json.getJSONArray("locations");
} catch (JSONException e) {
e.printStackTrace();
}
for (int i = 0; i < array.length(); i++){
try {
JSONObject around = array.getJSONObject(i);
vkIDs[i] = (around.getLong("vkid"));
user_sex[i] = (around.getInt("sex"));
xx[i] = (around.getDouble("x"));
yy[i] = (around.getDouble("y"));
name[i] = around.getString("name");
//name[i] = frnd_name(vkIDs[i]);
//Log.d("",name[i]);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
});
getPeopleThrd.start();
count += 1;
};
CameraPosition cameraPosition = new CameraPosition.Builder().target(new LatLng(x, y)).zoom(16).build();
map.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
//frnd_name(usr);
place();
this.onResume();
}
public void place(){
for (int i = 0; i<user_sex.length; i++){
//someone = new MarkerOptions().position(new LatLng(xx[i], yy[i])).title("Вы здесь!");
if (user_sex[i]==1){
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE)));
list.put(new LatLng(xx[i],yy[i]), i);
}
if (user_sex[i]==2){
//m[i]=map.addMarker(new MarkerOptions().title("Посмотреть").position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
list.put(new LatLng(xx[i],yy[i]), i);
}else{
if(xx[i]!=0 && yy[i]!=0 && (user_sex[i] < 1)){
//m[i]=map.addMarker(new MarkerOptions().title("Посмотреть").position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
map.addMarker(new MarkerOptions().title(name[i]).position(new LatLng(xx[i],yy[i])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
list.put(new LatLng(xx[i],yy[i]), i);
}
}
//map.addMarker(someone);
}
}
private String formatLocation(Location location) {
if (location == null)
return "";
return String.format(
"Coordinates: lat = %1$.4f, lon = %2$.4f, time = %3$tF %3$tT",
location.getLatitude(), location.getLongitude(), new Date(
location.getTime()));
}
private void checkEnabled() {
Log.d(" ... ", "Enabled: "+ locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER));
Log.d(" ... ", "Enabled: "+ locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER));
}
private void frnd_name(final long vkid){
ID = vkid;
Thread getName = new Thread(new Runnable(){
@Override
public void run(){
JSONParser jsonParser = new JSONParser();
JSONObject json = jsonParser.getJSONFromUrl("http://api.vk.com/method/users.get?user_id=" + ID);
JSONArray array = null;
try {
array = json.getJSONArray("response");
} catch (JSONException e) {
e.printStackTrace();
}
for (int i = 0; i < array.length(); i++){
try {
JSONObject around = array.getJSONObject(i);
String nameFrnd = around.getString("first_name");
nameFrnd = nameFrnd + " " + around.getString("last_name");
nm = nameFrnd;
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
});
getName.start();
if (getName.getState() == Thread.State.TERMINATED){
for (int i = 0; i < name.length; i++){
name[i] = nm;
}
}
}
}
答案 0 :(得分：0)
您正在
中添加标记 private void showLocation(Location location) {
}
您正在通过位置监听器调用 showLocation() 方法...
只有当您要求位置管理员提供更新时才会触发位置监听器，这意味着您需要发表声明......
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
1000 * 10, 10, locationListener);
由于您正在初始化位置管理器以使用 onResume 方法提供更新，因此在调用 onResume 方法......
您可以初始化位置管理器，以便在 onStart 方法中提供更新
@Override
protected void onStart() {
super.onStart();
mLocationClient.connect();
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
locationManager.requestLocationUpdates(provider, 0, 0, this);
}
您无需编写 onResume() 方法..
希望这会对你有帮助.........！