在Android中使用GPS获取当前位置 [英] Get current location using GPS in Android

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本文介绍了在Android中使用GPS获取当前位置的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在,我想利用GPS用户的当前位置的一个项目现在的工作。我看过很多教程,并试着写了code。在code在模拟器中运行良好。每次我发送邮件使用DDMS的latittude和经度,仿真器会检测到。主要的问题是,它不与实际设备的工作。虽然,我试图在其上的设备有互联网接入和GPS是开放的。我已经添加了必要的权限清单文件。

 公共类MainActivity延伸活动{TextView的纬度;
TextView的LON;
@覆盖
保护无效的onCreate(捆绑savedInstanceState){
    super.onCreate(savedInstanceState);
    的setContentView(R.layout.activity_main);
    纬度=(的TextView)findViewById(R.id.textView2);
    LON =(的TextView)findViewById(R.id.textView4);
    LM的LocationManager =(的LocationManager)getSystemService(Context.LOCATION_SERVICE);
    LocationListener的LL =新myLocationListener();
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,LL);
}@覆盖
公共布尔onCreateOptionsMenu(菜单菜单){
    //充气菜单;如果是present这增加了项目操作栏。
    。getMenuInflater()膨胀(R.menu.main,菜单);
    返回true;
}
   类myLocationListener实现LocationListener的{@覆盖
公共无效onLocationChanged(地点){
    // TODO自动生成方法存根
    如果(位置!= NULL){
        双PLAT = location.getLatitude();
        双PLONG = location.getLongitude();
        lat.setText(Double.toString(高原));
        lon.setText(Double.toString(PLONG));
    }
}@覆盖
公共无效onProviderDisabled(字符串提供商){
    // TODO自动生成方法存根}@覆盖
公共无效onProviderEnabled(字符串提供商){
    // TODO自动生成方法存根}@覆盖
公共无效onStatusChanged(字符串提供商,INT地位,捆绑演员){
    // TODO自动生成方法存根} }
}

在清单文件的权限

 <使用许可权的android:NAME =android.permission.ACCESS_FINE_LOCATION/>
<使用许可权的android:NAME =android.permission.ACCESS_COARSE_LOCATION/>
<使用许可权的android:NAME =android.permission.INTERNET对/>

我需要帮助,请。


解决方案

  GPSTracker GPS =新GPSTracker(本);
双纬度= gps.getLatitude();
双经度= gps.getLongitude();

使用GPS服务:

 进口android.app.AlertDialog;
进口android.app.Service;
进口android.content.Context;
进口android.content.DialogInterface;
进口android.content.Intent;
进口android.location.Location;
进口android.location.LocationListener;
进口android.location.LocationManager;
进口android.os.Bundle;
进口android.os.IBinder;
进口android.provider.Settings;
进口android.util.Log;公共类GPSTracker扩展服务实现LocationListener的{    私人最终上下文mContext;    //标志GPS状态
    布尔isGPSEnabled = FALSE;    //标志网络状态
    布尔isNetworkEnabled = FALSE;    //标志GPS状态
    布尔canGetLocation = FALSE;    地点位置; // 位置
    双纬度; //纬度
    双经度; //经度    //最小距离改变米的更新
    私有静态最后长MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; //10米    //毫秒更新之间的最短时间
    私有静态最后长MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1分钟    //声明一个位置管理
    受保护的LocationManager的LocationManager;    公共GPSTracker(上下文的背景下){
        this.mContext =背景;
        的getLocation();
    }    公共场所的getLocation(){
        尝试{
            的LocationManager =(的LocationManager)mContext
                    .getSystemService(LOCATION_SERVICE);            //获取GPS状态
            isGPSEnabled =的LocationManager
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);            //获取网络状态
            isNetworkEnabled =的LocationManager
                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);
            如果(isGPSEnabled&安培;!&安培;!isNetworkEnabled){
                //没有启用网络供应商
            }其他{
                this.canGetLocation = TRUE;
                如果(isNetworkEnabled){
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES,这一点);
                    Log.d(网络,网络);
                    如果(的LocationManager!= NULL){
                        位置= locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        如果(位置!= NULL){
                            纬度= location.getLatitude();
                            经度= location.getLongitude();
                        }
                    }
                }
                //如果GPS功能的获得纬度/长期使用GPS服务
                如果(isGPSEnabled){
                    如果(位置== NULL){
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES,这一点);
                        Log.d(GPS已启用,GPS功能的);
                        如果(的LocationManager!= NULL){
                            位置=的LocationManager
                                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            如果(位置!= NULL){
                                纬度= location.getLatitude();
                                经度= location.getLongitude();
                            }
                        }
                    }
                }
            }        }赶上(例外五){
        }
        返回的位置;
    }    / **
     *停止使用GPS监听器调用该函数将停止使用您的GPS
     *应用程序。
     * * /
    公共无效stopUsingGPS(){
        如果(的LocationManager!= NULL){
            locationManager.removeUpdates(GPSTracker.this);
        }
    }    / **
     *函数来获取纬度
     * * /
    公共双getLatitude(){
        如果(位置!= NULL){
            纬度= location.getLatitude();
        }
        //返回纬度
        返回纬度;
    }    / **
     *函数来获取经度
     * * /
    公共双getLongitude(){
        如果(位置!= NULL){
            经度= location.getLongitude();
        }        //返回经度
        返回经度;
    }    / **
     *功能检查启用GPS / WIFI
     *
     * @返回布尔
     * * /
    公共布尔canGetLocation(){
        返回this.canGetLocation;
    }    / **
     *功能,以显示设置警告对话框在pressing设置按钮会
     *劳克设置选项
     * * /
    公共无效showSettingsAlert(){
        AlertDialog.Builder alertDialog =新AlertDialog.Builder(mContext);        //设置DialogHelp标题
        alertDialog.setTitle(GPS是设置);        //设置DialogHelp留言
        alertDialog
                .setMessage(GPS未启用你想要去设置菜单?);        //在pressing设置按钮
        alertDialog.setPositiveButton(设置,
                新DialogInterface.OnClickListener(){
                    公共无效的onClick(DialogInterface对话,诠释它){
                        意向意图=新意图(
                                Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        mContext.startActivity(意向);
                    }
                });        //在pressing取消按钮
        alertDialog.setNegativeButton(取消,
                新DialogInterface.OnClickListener(){
                    公共无效的onClick(DialogInterface对话,诠释它){
                        dialog.cancel();
                    }
                });        //显示警报信息
        alertDialog.show();
    }    @覆盖
    公共无效onLocationChanged(地点){
        浮bestAccuracy = -1f;
        如果(location.getAccuracy()!= 0.0
            &功放;&安培; (location.getAccuracy()&下; bestAccuracy)|| bestAccuracy == -1f){
                locationManager.removeUpdates(本);
        }
        bestAccuracy = location.getAccuracy();
    }    @覆盖
    公共无效onProviderDisabled(字符串提供商){
    }    @覆盖
    公共无效onProviderEnabled(字符串提供商){
    }    @覆盖
    公共无效onStatusChanged(字符串提供商,INT地位,捆绑演员){
    }    @覆盖
    公众的IBinder onBind(意向为arg0){
        返回null;
    }    公众持股量getAccurecy()
    {
        返回location.getAccuracy();
    }}

I'm working now in a project which i want to get the current location of user using gps. I have read many tutorial and tried to write the code. The code works well in the emulator. Every time i send the latittude and longitude using DDMS, the emulator will detect that. The main problem is that it doesn't work with the real devices. Although, the devices that i tried on it has internet access and the GPS is open. I have added the required permissions to the manifest file.

public class MainActivity extends Activity {

TextView lat;
TextView lon;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    lat=(TextView)findViewById(R.id.textView2);
    lon=(TextView)findViewById(R.id.textView4);
    LocationManager lm=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
    LocationListener ll=new myLocationListener();
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0, ll);
}

@Override
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;
}
   class myLocationListener implements LocationListener{

@Override
public void onLocationChanged(Location location) {
    // TODO Auto-generated method stub
    if(location!=null){
        double pLat=location.getLatitude();
        double pLong=location.getLongitude();
        lat.setText(Double.toString(pLat));
        lon.setText(Double.toString(pLong));
    }
}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub

}

@Override
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

}

 }
}

the permission in manifest file

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>

I need a help please.

解决方案

GPSTracker gps = new GPSTracker(this);
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();

use this GPS service:

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;

public class GPSTracker extends Service implements LocationListener {

    private final Context mContext;

    // flag for GPS status
    boolean isGPSEnabled = false;

    // flag for network status
    boolean isNetworkEnabled = false;

    // flag for GPS status
    boolean canGetLocation = false;

    Location location; // location
    double latitude; // latitude
    double longitude; // longitude

    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

    // Declaring a Location Manager
    protected LocationManager locationManager;

    public GPSTracker(Context context) {
        this.mContext = context;
        getLocation();
    }

    public Location getLocation() {
        try {
            locationManager = (LocationManager) mContext
                    .getSystemService(LOCATION_SERVICE);

            // getting GPS status
            isGPSEnabled = locationManager
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);

            // getting network status
            isNetworkEnabled = locationManager
                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);


            if (!isGPSEnabled && !isNetworkEnabled) {
                // no network provider is enabled
            } else {
                this.canGetLocation = true;
                if (isNetworkEnabled) {
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("Network", "Network");
                    if (locationManager != null) {
                        location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
                // if GPS Enabled get lat/long using GPS Services
                if (isGPSEnabled) {
                    if (location == null) {
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("GPS Enabled", "GPS Enabled");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                }
            }

        } catch (Exception e) {
        }
        return location;
    }

    /**
     * Stop using GPS listener Calling this function will stop using GPS in your
     * app.
     * */
    public void stopUsingGPS() {
        if (locationManager != null) {
            locationManager.removeUpdates(GPSTracker.this);
        }
    }

    /**
     * Function to get latitude
     * */
    public double getLatitude() {
        if (location != null) {
            latitude = location.getLatitude();
        }
        // return latitude
        return latitude;
    }

    /**
     * Function to get longitude
     * */
    public double getLongitude() {
        if (location != null) {
            longitude = location.getLongitude();
        }

        // return longitude
        return longitude;
    }

    /**
     * Function to check GPS/wifi enabled
     * 
     * @return boolean
     * */
    public boolean canGetLocation() {
        return this.canGetLocation;
    }

    /**
     * Function to show settings alert dialog On pressing Settings button will
     * lauch Settings Options
     * */
    public void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        // Setting DialogHelp Title
        alertDialog.setTitle("GPS is settings");

        // Setting DialogHelp Message
        alertDialog
                .setMessage("GPS is not enabled. Do you want to go to settings menu?");

        // On pressing Settings button
        alertDialog.setPositiveButton("Settings",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent = new Intent(
                                Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        mContext.startActivity(intent);
                    }
                });

        // on pressing cancel button
        alertDialog.setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });

        // Showing Alert Message
        alertDialog.show();
    }

    @Override
    public void onLocationChanged(Location location) {
        float bestAccuracy = -1f;
        if (location.getAccuracy() != 0.0f
            && (location.getAccuracy() < bestAccuracy) || bestAccuracy == -1f) {
                locationManager.removeUpdates(this);
        }
        bestAccuracy = location.getAccuracy();
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }

    public float getAccurecy()
    {
        return location.getAccuracy();
    }

}

这篇关于在Android中使用GPS获取当前位置的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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