如何调用事件depening在latitide和经度? [英] How to call event depening upon latitide and longitude?

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问题描述

我正在开发一个位置基本应用程序。其确定的经度和纬度。

现在我想将它与相同的值进行比较,如果匹配我想打电话给事件。
我尝试它在许多方面,但无法做到这一点。请给一个想法,code PLZ。
工作我做直到现在

主要活动

 包com.example.gpstracking;进口android.app.Activity;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.Button;
进口android.widget.Toast;公共类AndroidGPSTrackingActivity延伸活动{按钮btnShowLocation;// GPSTracker类
GPSTracker GPS; @覆盖
 公共无效的onCreate(捆绑savedInstanceState){
    super.onCreate(savedInstanceState);
    的setContentView(R.layout.main);    btnShowLocation =(按钮)findViewById(R.id.btnShowLocation);    //展示位置按钮单击事件
    btnShowLocation.setOnClickListener(新View.OnClickListener(){        @覆盖
        公共无效的onClick(查看为arg0){
            //创建类对象
            GPS =新GPSTracker(AndroidGPSTrackingActivity.this);            //检查是否启用GPS
            如果(gps.canGetLocation()){                双纬度= gps.getLatitude();
                双经度= gps.getLongitude();                // \\ n是新行
                Toast.makeText(getApplicationContext(),您现在的位置 - \\ nLat:+纬度+\\ nLong:+经度,Toast.LENGTH_LONG).show();
            }其他{
                //无法获取位置
                未启用// GPS或网络
                //要求用户在设置中启用GPS /网络
                gps.showSettingsAlert();            }        }
    });
 } }

和子活动

 包com.example.gpstracking;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=的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){
        e.printStackTrace();
    }    返回的位置;
}/ **
 *停止使用GPS监听器
 *调用此函数将停止在你的应用程序中使用GPS
 * * /
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设置按钮将劳克设置选项
 * * /
公共无效showSettingsAlert(){
    AlertDialog.Builder alertDialog =新AlertDialog.Builder(mContext);    //设置对话框标题
    alertDialog.setTitle(GPS是设置);    //设置对话框留言
    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){
}@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;
} }


解决方案

使用的onLocationChanged() - 方法已在您的code。如果用户移动,你可以做你的坐标进行比较,然后激发您的活动。

http://developer.android.com/reference/android/location/ LocationListener.html

更新:这是code,你可以用它来检测是否达到了一定的目的:

请为latitute和经度在你的类两个变量。因此,例如:

 双纬度= 10.0;
双LON = 5.0;

然后修改onLocationChanged() - 方法是这样的:

  @覆盖
公共无效onLocationChanged(地点){
 双currentLat = location.getLatitude();
 双currentLon = location.getLongitude();
 //你将需要创建或重用的距离功能......这应该是很容易容易找到...
 如果(距离(纬度,经度,currentLat,currentLon)LT; 2.0){
 //你想做的事...
 }
}

因此​​,对于每个位置的变化,该手机检测,这将在距离​​比较到上次的距离和触发事件...

i am developing a location base application. which determines the latitude and longitude.

now i want to compare it with same values and if matched i want to call event. i try it in many ways but unable to do it. kindly give an idea and code plz. work that i did till now

Main activity

 package com.example.gpstracking;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class AndroidGPSTrackingActivity extends Activity {

Button btnShowLocation;

// GPSTracker class
GPSTracker gps;

 @Override
 public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    btnShowLocation = (Button) findViewById(R.id.btnShowLocation);

    // show location button click event
    btnShowLocation.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {        
            // create class object
            gps = new GPSTracker(AndroidGPSTrackingActivity.this);

            // check if GPS enabled     
            if(gps.canGetLocation()){

                double latitude = gps.getLatitude();
                double longitude = gps.getLongitude();

                // \n is for new line
                Toast.makeText(getApplicationContext(), "Your  Location    -          \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();  
            }else{
                // can't get location
                // GPS or Network is not enabled
                // Ask user to enable GPS/network in settings
                gps.showSettingsAlert();

            }

        }
    });
 }

 }

and sub activity

package com.example.gpstracking;

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) {
        e.printStackTrace();
    }

    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 Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog 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) {
}

@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;
}

 }

解决方案

Use the onLocationChanged()-method that is already in your code. If the user moves, you can do your coordinate-comparison and then fire your event.

http://developer.android.com/reference/android/location/LocationListener.html

Update: This is the code that you could use to detect whether you reached a certain destination:

Make two variables for latitute and longitude in your class. So for example:

double lat=10.0;
double lon=5.0;

Then modify the onLocationChanged()-Method to something like this:

@Override
public void onLocationChanged(Location location) {
 double currentLat=location.getLatitude();
 double currentLon=location.getLongitude();
 //you will need to create or reuse a distance-function... this should be easily findable...
 if (distance(lat,lon,currentLat,currentLon)<2.0){
 //do what you want to do...
 }
}

So for every location change that the phone detects, it will compare the distance to the last distance and fire the event...

这篇关于如何调用事件depening在latitide和经度?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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