我是否为网络位置和gps位置注册了一个locationlistener对象,还是为每个位置创建一个单独的位置?
答案 0 :(得分:2)
您可以为两者使用相同的侦听器。
当您获得onLocationChanged()
或onStatusChanged()
回调时,您可以检查传入的参数(位置或提供商)以确定回调的来源(即:网络或GPS)。
答案 1 :(得分:1)
使用以下类检索位置。它将选择最佳提供商并返回经度和纬度:
package com.test.location;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
public class LocationPicker implements LocationListener, OnCancelListener{
private Context ctx;
private LocationManager locationMgr;
private boolean stopFlag;
private ProgressDialog dialog;
public LocationPicker(Context ctx) {
this.ctx = ctx;
}
public void retrieveLocation() {
String locCtx = Context.LOCATION_SERVICE;
locationMgr = (LocationManager) ctx.getSystemService(locCtx);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationMgr.getBestProvider(criteria, true);
locationMgr.requestLocationUpdates(provider, 0, 0, this);
Runnable showWaitDialog = new Runnable() {
@Override
public void run() {
while (!stopFlag) {
// Wait for first GPS Fix (do nothing until loc != null)
}
// After receiving first GPS Fix dismiss the Progress Dialog
dialog.dismiss();
}
};
dialog = ProgressDialog.show(ctx, "Please wait...", "Retrieving GPS data...", true);
dialog.setCancelable(true);
dialog.setOnCancelListener(this);
Thread t = new Thread(showWaitDialog);
t.start();
}
@Override
public void onLocationChanged(Location location) {
if (location != null) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
stopFlag = true;
Toast.makeText(ctx, "Latitude : " + latitude + " Longitude : " + longitude , Toast.LENGTH_LONG).show();
}
locationMgr.removeUpdates(this);
}
@Override
public void onProviderDisabled(String provider) {
// Toast.makeText(ctx, "GPS Disabled", Toast.LENGTH_LONG).show();
//
// Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
// ctx.startActivity(intent);
}
@Override
public void onProviderEnabled(String provider) {
// Toast.makeText(ctx, "GPS Enabled", Toast.LENGTH_SHORT).show();
//
// ctx.startActivity(new Intent(ctx, LocationPickerActivity.class));
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onCancel(DialogInterface dialog) {
stopFlag = true;
locationMgr.removeUpdates(this);
}
}
创建上面的类之后,只需调用下面的方法,它将返回纬度和经度:::
LocationPicker lp = new LocationPicker(this);
lp.retrieveLocation();
注意:自定义位置侦听器中还包含进度对话框。