private static final int BAIDU_READ_PHONE_STATE = 100;//定位权限请求
private static final int PRIVATE_CODE = 1315;//开启GPS权限

/**
 * 检测GPS、位置权限是否开启
 */
public void showGPSContacts() {
 lm = (LocationManager) this.getSystemService(this.LOCATION_SERVICE);
 boolean ok = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
 if (ok) {//开了定位服务
  if (Build.VERSION.SDK_INT >= 23) { //判断是否为android6.0系统版本，如果是，需要动态添加权限
   if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
     != PERMISSION_GRANTED) {// 没有权限，申请权限。
    ActivityCompat.requestPermissions(this, LOCATIONGPS,
      BAIDU_READ_PHONE_STATE);
   } else {
    getLocation();//getLocation为定位方法
   }
  } else {
   getLocation();//getLocation为定位方法
  }
 } else {
  Toast.makeText(this, "系统检测到未开启GPS定位服务,请开启", Toast.LENGTH_SHORT).show();
  Intent intent = new Intent();
  intent.setAction(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
  startActivityForResult(intent, PRIVATE_CODE);
 }
}

/**
 * 获取具体位置的经纬度
 */
private void getLocation() {
 // 获取位置管理服务
 LocationManager locationManager;
 String serviceName = Context.LOCATION_SERVICE;
 locationManager = (LocationManager) this.getSystemService(serviceName);
 // 查找到服务信息
 Criteria criteria = new Criteria();
 criteria.setAccuracy(Criteria.ACCURACY_FINE); // 高精度
 criteria.setAltitudeRequired(false);
 criteria.setBearingRequired(false);
 criteria.setCostAllowed(true);
 criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗
 String provider = locationManager.getBestProvider(criteria, true); // 获取GPS信息
 /**这段代码不需要深究，是locationManager.getLastKnownLocation(provider)自动生成的，不加会出错**/
 if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PERMISSION_GRANTED) {
  // TODO: Consider calling
  // ActivityCompat#requestPermissions
  // here to request the missing permissions, and then overriding
  // public void onRequestPermissionsResult(int requestCode, String[] permissions,
  //           int[] grantResults)
  // to handle the case where the user grants the permission. See the documentation
  // for ActivityCompat#requestPermissions for more details.
  return;
 }
 Location location = locationManager.getLastKnownLocation(provider); // 通过GPS获取位置
 updateLocation(location);
}

/**
 * 获取到当前位置的经纬度
 * @param location
 */
private void updateLocation(Location location) {
 if (location != null) {
  double latitude = location.getLatitude();
  double longitude = location.getLongitude();
  LogUtil.e("维度：" + latitude + "\n经度" + longitude);
 } else {
  LogUtil.e("无法获取到位置信息");
 }
}
/**
 * Android6.0申请权限的回调方法
 */
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
 super.onRequestPermissionsResult(requestCode, permissions, grantResults);
 switch (requestCode) {
  // requestCode即所声明的权限获取码，在checkSelfPermission时传入
  case BAIDU_READ_PHONE_STATE:
   //如果用户取消，permissions可能为null.
   if (grantResults[0] == PERMISSION_GRANTED && grantResults.length > 0) { //有权限
    // 获取到权限，作相应处理
    getLocation();
   } else {
    showGPSContacts();
   }
   break;
  default:
   break;
 }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 switch (requestCode) {
  case PRIVATE_CODE:
    showContacts();
   break;

 }
}

static final String[] LOCATIONGPS = new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, 
  Manifest.permission.ACCESS_FINE_LOCATION, 
  Manifest.permission.READ_PHONE_STATE};