我需要通过GPS程序获得我的当前位置。 我怎样才能做到呢?
当前回答
LocationManager是一个类,它提供内置方法来获取最后知道的位置
步骤1:如下所示创建LocationManager对象
导航(导航);
步骤2:添加标准
*Criteria is use for setting accuracy*
Criteria criteria = new Criteria();
int currentapiVersion = android.os.Build.VERSION.SDK_INT;
if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB) {
criteria.setSpeedAccuracy(Criteria.ACCURACY_HIGH);
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(true);
criteria.setBearingRequired(true);
criteria.setSpeedRequired(true);
}
步骤3:获取可用的提供商
有两种类型的供应商GPS和网络
String provider = locationManager.getBestProvider(criteria, true);
第四步:了解最后知道的地点
Location location = locationManager.getLastKnownLocation(provider);
第五步:获取经纬度
如果location对象为空,那么不要尝试调用下面的方法
getLatitude和getLongitude是返回双值的方法
其他回答
获取位置的最佳方法如下所示
// put dependancy
implementation 'com.google.android.gms:play-services-location:11.0.4'
// PUT permissions in Menifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
// create a Java file as below
public class SingleShotLocationProvider {
public static interface LocationCallback {
public void onNewLocationAvailable(GPSCoordinates location);
}
// calls back to calling thread, note this is for low grain: if you want higher precision, swap the
// contents of the else and if. Also be sure to check gps permission/settings are allowed.
// call usually takes <10ms
public static void requestSingleUpdate(final Context context, final LocationCallback callback) {
final LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
boolean isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (isNetworkEnabled) {
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_COARSE);
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
locationManager.requestSingleUpdate(criteria, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude()));
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}, null);
} else {
boolean isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (isGPSEnabled) {
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
locationManager.requestSingleUpdate(criteria, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude()));
}
@Override public void onStatusChanged(String provider, int status, Bundle extras) { }
@Override public void onProviderEnabled(String provider) { }
@Override public void onProviderDisabled(String provider) { }
}, null);
}
}
}
// consider returning Location instead of this dummy wrapper class
public static class GPSCoordinates {
public float longitude = -1;
public float latitude = -1;
public GPSCoordinates(float theLatitude, float theLongitude) {
longitude = theLongitude;
latitude = theLatitude;
}
public GPSCoordinates(double theLatitude, double theLongitude) {
longitude = (float) theLongitude;
latitude = (float) theLatitude;
}
}
}
// FILE FINISHED
// FETCH LOCATION FROM ACTIVITY AS BELOW
public void getLocation(Context context) {
MyApplication.log(LOG_TAG, "getLocation() ");
SingleShotLocationProvider.requestSingleUpdate(context,
new SingleShotLocationProvider.LocationCallback() {
@Override
public void onNewLocationAvailable(SingleShotLocationProvider.GPSCoordinates loc) {
location = loc;
MyApplication.log(LOG_TAG, "getLocation() LAT: " + location.latitude + ", LON: " + location.longitude);
}
});
}
既然谷歌Play位置服务已经推出,我建议开发者开始使用新的融合位置提供商。你会发现它更容易使用和更准确。请观看谷歌I/O视频《超越蓝点:Android位置的新功能》,由两位创建了新的谷歌Play位置服务API的人制作。
I've been working with location APIs on a number of mobile platforms, and I think what these two guys have done is really revolutionary. It's gotten rid of a huge amount of the complexities of using the various providers. Stack Overflow is littered with questions about which provider to use, whether to use last known location, how to set other properties on the LocationManager, etc. This new API that they have built removes most of those uncertainties and makes the location services a pleasure to use.
I've written an Android app that periodically gets the location using Google Play location services and sends the location to a web server where it is stored in a database and can be viewed on Google Maps. I've written both the client software (for Android, iOS, Windows Phone and Java ME) and the server software (for ASP.NET and SQL Server or PHP and MySQL). The software is written in the native language on each platform and works properly in the background on each. Lastly, the software has the MIT License. You can find the Android client here:
https://github.com/nickfox/GpsTracker/tree/master/phoneClients/android
GoogleSamples有详细的例子使用最新的FusedLocationProviderApi。 不幸的是,被点赞最多的答案都过时了。
按照下面的例子使用FusedLocationProviderApi实现位置服务
https://github.com/googlesamples/android-play-location/tree/master/LocationUpdates
https://github.com/googlesamples/android-play-location/blob/master/LocationUpdates/app/src/main/java/com/google/android/gms/location/sample/locationupdates/MainActivity.java
获得位置更新需要大量的代码在Android,你需要照顾
谷歌播放服务可用性检查, 更新谷歌播放服务,如果它是旧的或不可用 对话框创建GoogleApiClient和它的回调连接,断开等。 停止并释放用于位置更新的资源 处理位置权限场景 检查“位置”服务是否开启 获取最后已知位置也不是那么容易 如果在一定时间后没有得到位置,则退回到最后一个已知位置
为了简化所有这些步骤,我创建了android - easylocation(小型android库),它将照顾所有这些东西,你可以专注于业务逻辑。
所有你需要的是扩展EasyLocationActivity和这个
requestSingleLocationFix(easyLocationRequest);
or
requestLocationUpdates(easyLocationRequest);
签出示例应用程序和步骤需要在这里https://github.com/akhgupta/Android-EasyLocation
LocationManager是一个类,它提供内置方法来获取最后知道的位置
步骤1:如下所示创建LocationManager对象
导航(导航);
步骤2:添加标准
*Criteria is use for setting accuracy*
Criteria criteria = new Criteria();
int currentapiVersion = android.os.Build.VERSION.SDK_INT;
if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB) {
criteria.setSpeedAccuracy(Criteria.ACCURACY_HIGH);
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(true);
criteria.setBearingRequired(true);
criteria.setSpeedRequired(true);
}
步骤3:获取可用的提供商
有两种类型的供应商GPS和网络
String provider = locationManager.getBestProvider(criteria, true);
第四步:了解最后知道的地点
Location location = locationManager.getLastKnownLocation(provider);
第五步:获取经纬度
如果location对象为空,那么不要尝试调用下面的方法
getLatitude和getLongitude是返回双值的方法
推荐文章
- 警告:API ' variable . getjavacompile()'已过时,已被' variable . getjavacompileprovider()'取代
- 安装APK时出现错误
- 碎片中的onCreateOptionsMenu
- TextView粗体通过XML文件?
- 如何使线性布局的孩子之间的空间?
- DSL元素android.dataBinding。enabled'已过时,已被'android.buildFeatures.dataBinding'取代
- ConstraintLayout:以编程方式更改约束
- PANIC: AVD系统路径损坏。检查ANDROID_SDK_ROOT值
- 如何生成字符串类型的buildConfigField
- Recyclerview不调用onCreateViewHolder
- Android API 21工具栏填充
- Nginx提供下载。php文件,而不是执行它们
- Android L中不支持操作栏导航模式
- 如何在TextView中添加一个子弹符号?
- PreferenceManager getDefaultSharedPreferences在Android Q中已弃用