如何在棒棒糖或更高版本中打开位置并获取当前位置

Posted 2023-04-14

【中文标题】如何在棒棒糖或更高版本中打开位置并获取当前位置

【英文标题】：How to turn on Location in lollipop or up version and get current location

【发布时间】：2017-08-06 19:16:14

【问题描述】：

我尝试在棒棒糖设备（不是模拟器）中打开 gps 位置。我编写了实时权限代码，但无法正常工作。这是我的来源：

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) 
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (ActivityCompat.checkSelfPermission(this, permissions[0]) == PackageManager.PERMISSION_GRANTED) 
        askForGPS();
        Toast.makeText(this, "Permission granted", Toast.LENGTH_SHORT).show();
     else 
        Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
    


private void askForGPS()
    mLocationRequest = LocationRequest.create();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setInterval(30 * 1000);
    mLocationRequest.setFastestInterval(5 * 1000);
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(mLocationRequest);
    builder.setAlwaysShow(true);
    result = LocationServices.SettingsApi.checkLocationSettings(client, builder.build());
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() 
        @Override
        public void onResult(LocationSettingsResult result) 
            final Status status = result.getStatus();
            switch (status.getStatusCode()) 
                case LocationSettingsStatusCodes.SUCCESS:
                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                    try 
                        status.startResolutionForResult(MainActivity.this, GPS_SETTINGS);
                     catch (IntentSender.SendIntentException e) 
                        e.printStackTrace();

                    
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    break;
            
        
    );


private void askForPermission(String permission, Integer requestCode) 
    if (ContextCompat.checkSelfPermission(MainActivity.this, permission) != PackageManager.PERMISSION_GRANTED) 
        if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, permission)) 

            ActivityCompat.requestPermissions(MainActivity.this, new String[]permission, requestCode);

         else 

            ActivityCompat.requestPermissions(MainActivity.this, new String[]permission, requestCode);
        
     else 
        Toast.makeText(this, "" + permission + " is already granted.", Toast.LENGTH_SHORT).show();
    

在按钮单击中，我尝试像这样请求许可。

askForPermission(Manifest.permission.ACCESS_FINE_LOCATION,LOCATION);

当我运行我的应用程序时，我无法显示 alertDialog 并且无法打开位置。我不知道，但显示此 Toast 消息的程序“已被授予”。 我的 askForPermission 方法无法正常工作。我的问题是如何在实时许可的情况下打开 GPS 并获取当前位置？

 public void getCurrenctLocation(Location location)

    Log.e("Current lang", location.getLatitude()+"");
    Log.e("Current long", location.getLongitude()+"");

如何以及在哪里可以使用我的 getCurrenctLocation 方法？ 谢谢

【参考方案1】：

1) 像这样修改你的askForPermission()：

private void askForPermission(String permission, Integer requestCode) 
    if (ContextCompat.checkSelfPermission(MainActivity.this, permission) != PackageManager.PERMISSION_GRANTED) 

            ActivityCompat.requestPermissions(MainActivity.this, new String[]permission, requestCode);

     else 
           askForGPS();
    

2) 修改onRequePermissionResult() 如下：

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) 
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
     switch (requestCode) 
        case LOCATION:            //You have to declare LOCATION globally. example: private int LOCATION = 1 ;

            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) 
                // Permission Granted
                askForGPS();
                Toast.makeText(this, "Permission granted", Toast.LENGTH_SHORT).show();
                        
            else 
                 if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, permissions[0])) 
                     Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
                   else 
                      Toast.makeText(this, "Permission denied permanently, please go to app settings to grant permission.", Toast.LENGTH_SHORT).show(); 
                  
            
            break;
    

【讨论】：

感谢您的关注。gps 开启后如何使用 getCurrenctLocation 方法检查当前位置？ @tahsinRupam

您可以使用getLastLocation/位置变化监听器获取位置

你能告诉我 onRequestPermissionsResult @tahsinRupam 中的权限是什么

您在字符串中请求的权限，（例如：Manifest.permission.WRITE_EXTERNAL_STORAGE）