获取当前定位,androidstudio返回上一步

新的LocationUtils工具类import Android.annotation.suppress lint； import android.content.Context； import Android.content.pm.package manager； import android.location.Address； import Android.location.criteria； import Android.location.geocoder； import Android.location.location； import Android.location.location manager； import android.util.Log； import android.widget.Toast； import java.io.IOException； import java.text.DecimalFormat； import java.util.List； import java.util.Locale； publicclasslocationutils {权限管理器； saticlocationutilslocationutils； publicstaticlocationutilsgetinstance () if ) location utils==null (location utils=new location utils )； } return locationUtils； } publicstringgetlocations (上下文上下文) if (！ isopenGPS(context ) ) toast.maketext ) context，'定位未打开，无法获取地理位置'，Toast.LENGTH_SHORT ).show )； 返回' '； } String strLocation=' '； decimal format df=new decimal format (' # # # 0.0000 )； if (！ checkpermission(context，permission.access _ coarse _ location ) toast.maketext ) context，'定位权限关闭，无法获取地理位置接受toassion } try { //系统服务的位置管理器=(location manager ) context.getsystemservice (context.location _ ) criteria对象Criteria criteria=new Criteria (创建； criteria.set accuracy (criteria.accuracy _ coarse )； //安装不需要获取高程方向数据criteria.setaltituderequired (false )；安装需要获取criteria.setbearingrequired (false )； //在设置中允许发生费用Criteria.setcostallowed(true )； //要求低功耗的criteria.setpowerrequirement (criteria.power _ low )； string provider=location manager.getbestprovider (criteria，true )； log.e(locationtool，) locationprovideris，(provider )； @ suppress lint (missing permission ) location location=location manager.getlastknownlocation provider； //第一次设备的位置if(location！=null((/strlocation=df.format ) location.getlatitude )、' df.format ) location.getlongitude )； //strlocation=' ' getlocationaddress (context，location )； if(strlocation.equals ("")) { strLocation += "" + convertAddress(context, location.getLatitude(), location.getLongitude()); } } } catch (SecurityException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return strLocation; } public String convertAddress(Context context, double latitude, double longitude) { Geocoder mGeocoder = new Geocoder(context, Locale.getDefault()); StringBuilder mStringBuilder = new StringBuilder(); try { List<Address> mAddresses = mGeocoder.getFromLocation(latitude, longitude, 1); if (!mAddresses.isEmpty()) { Address address = mAddresses.get(0); mStringBuilder.append(address.getLocality()).append(address.getThoroughfare()); } } catch (IOException e) { e.printStackTrace(); } return mStringBuilder.toString(); } private boolean checkPermission(Context context, permission permName) { int perm = context.checkCallingOrSelfPermission("android.permission." + permName.toString()); return perm == PackageManager.PERMISSION_GRANTED; } private enum permission { ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION } private String getLocationAddress(Context mContext, Location location) { String addNow = ""; Geocoder geoCoder = new Geocoder(mContext, Locale.CHINESE); try { List<Address> addresses = geoCoder.getFromLocation( location.getLatitude(), location.getLongitude(), 1); Address address = addresses.get(0); Log.w("LocationTool", "远程获取定位全部为: " + address.toString()); if (address.getAddressLine(0) != null && !address.getAddressLine(0).equals("")) { addNow = address.getAddressLine(0); Log.w("LocationTool", "获取成功第一种: " + addNow); } else if (addNow.equals("") && address.getFeatureName() != null && !address.getFeatureName().equals("")) { addNow = address.getLocality() + address.getFeatureName(); Log.w("LocationTool", "获取成功第二种: " + addNow); } else { int maxLine = address.getMaxAddressLineIndex(); if (maxLine >= 2) { addNow = address.getAddressLine(1) + address.getAddressLine(2); } else { addNow = address.getAddressLine(1); } Log.w("LocationTool", "获取成功第三种: " + addNow); } } catch (IOException e) { addNow = ""; e.printStackTrace(); } if (addNow.contains("null")) { addNow = addNow.replaceAll("null", ""); } return addNow; } /** * 判断GPS是否开启，GPS或者AGPS开启一个就认为是开启的 * * @param context * @return true 表示开启 */ private boolean isOPenGPS(final Context context) { LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); // GPS定位 boolean gps = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); // 网络服务定位 boolean network = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (gps || network) { return true; } return false; } } 调用方式： Log.i("LocationTool", "获取信息：" + LocationUtils.getInstance().getLocations(MainActivity.this));