如何在 android 中启用 Network Provider？

Posted 2023-04-14

【中文标题】如何在 android 中启用 Network Provider？

【英文标题】：How enabled Network Provider in android?

【发布时间】：2014-06-12 03:50:20

【问题描述】：

当我使用设备（索尼 Xperia）调试我的代码以使用 WIFI 获取纬度和经度时，显示网络提供商的错误状态。WIFI 连接已打开并且我将所有必需的权限添加到 mainfeast.xml 文件中。

它告诉我这个方法是空的。

NetworkProvider=locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

并在启用网络提供商时显示位置的空值。

locationmanager.getLastKnownLocation(LocationManager.NETWORK_Provider);

我添加了这些权限。

 <uses-permission android:name="android.permission.INTERNET"/>
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 <uses-permission android:name="android.permission.ACCESS_LOCATION"/>
 <uses-permission android:name="android.permission.ACCESS_GPS"/>
 <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
 <uses-permission android:name="android.permission.INSTALL_LOCATION_PROVIDER"/>
 <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 <uses-permission  android:name="android.permission.CHANGE_WIFI_STATE"/>
 <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

我该如何解决这个问题。

我的代码是

protected void onCreate(Bundle savedInstanceState) 

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button=(Button) findViewById(R.id.button1);
context=getApplicationContext();
button.setOnClickListener(new OnClickListener() 

    @Override
    public void onClick(View v) 
    
    status12=checkStatus();
    if(status12)
    
        addListenerAction();
    
    
);


public boolean checkStatus()

locationManager=(LocationManager) getSystemService(Context.LOCATION_SERVICE);
provider1=locationManager.getProviders(true);
for(String s : provider1)

    if(s.equals(LocationManager.GPS_PROVIDER))
    
    gpsStatus=locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    if(gpsStatus)
    
        status=true;
    
    
    if(s.equals(LocationManager.NETWORK_PROVIDER))
    
    NetworkProvider=locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
    if(NetworkProvider)
    
        status=true;
    
    
    if(s.equals(LocationManager.PASSIVE_PROVIDER))
    
    PassiveProvider=locationManager.isProviderEnabled(LocationManager.PASSIVE_PROVIDER);

    if(PassiveProvider)
    
        status=true;
    
    

return status;


private class Abcd implements LocationListener

@Override
public void onLocationChanged(Location loc)

    if(loc !=null)
    
    if(gpsStatus)
    

        latitude=loc.getLatitude();
        longitude=loc.getLongitude();
        System.out.println("Longitude ="+longitude);
        System.out.println("Latitude ="+latitude);

        try
        
        geocoder = new Geocoder(context,Locale.getDefault());
        System.out.println("GeoCoder ="+geocoder);
        address=geocoder.getFromLocation(latitude,longitude, 1);
        System.out.println("Address ="+address);
        if(!address.isEmpty())
        
            Cityname=address.get(0).getLocality();
            country = address.get(0).getCountryName();
            Address=address.get(0).getAddressLine(0);
            System.out.println("Country Name ="+country);
            System.out.println("CityName ="+Cityname);
            System.out.println("Address ="+Address);
            ShowLocation sw=new ShowLocation();

        
        
        catch (IOException e) 

        e.printStackTrace();
        
    
    if(NetworkProvider)
    
        latitude=loc.getLatitude();
        longitude=loc.getLongitude();
        System.out.println("Longitude ="+longitude);
        System.out.println("Latitude ="+latitude);

        try
        
        geocoder = new Geocoder(context,Locale.getDefault());
        System.out.println("GeoCoder ="+geocoder);
        address=geocoder.getFromLocation(latitude,longitude, 1);
        System.out.println("Address ="+address);
        if(!address.isEmpty())
        
            Cityname=address.get(0).getLocality();
            country = address.get(0).getCountryName();
            Address=address.get(0).getAddressLine(0);
            System.out.println("Country Name ="+country);
            System.out.println("CityName ="+Cityname);
            System.out.println("Address ="+Address);
            ShowLocation sw=new ShowLocation();

        
        
        catch (IOException e) 

        e.printStackTrace();
        
    
    if(PassiveProvider)
    
        latitude=loc.getLatitude();
        longitude=loc.getLongitude();
        System.out.println("Longitude ="+longitude);
        System.out.println("Latitude ="+latitude);

        try
        
        geocoder = new Geocoder(context,Locale.getDefault());
        System.out.println("GeoCoder ="+geocoder);
        address=geocoder.getFromLocation(latitude,longitude, 1);
        System.out.println("Address ="+address);
        if(!address.isEmpty())
        
            Cityname=address.get(0).getLocality();
            country = address.get(0).getCountryName();
            Address=address.get(0).getAddressLine(0);
            System.out.println("Country Name ="+country);
            System.out.println("CityName ="+Cityname);
            System.out.println("Address ="+Address);
            ShowLocation sw=new ShowLocation();

        
        
        catch (IOException e) 

        e.printStackTrace();
        
    


    

@Override   
public void onProviderDisabled(String provider) 


@Override
public void onProviderEnabled(String provider) 

@Override
public void onStatusChanged(String provider, int status,
    Bundle extras) 



public void addListenerAction()

locationListener=new Abcd(); 
if(gpsStatus)

    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,time,distance, locationListener);
    Criteria criteria=new Criteria();
    provider=locationManager.getBestProvider(criteria, true);
    location=locationManager.getLastKnownLocation(provider);
    System.out.println("Location ="+location);
    locationListener.onLocationChanged(location);

if(NetworkProvider)

    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,time,distance, locationListener);
    Criteria criteria=new Criteria();
    provider=locationManager.getBestProvider(criteria, true);
    location=locationManager.getLastKnownLocation(provider);
    locationListener.onLocationChanged(location);

if(PassiveProvider)

    locationManager.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER,time,distance, locationListener);
    Criteria criteria=new Criteria();
    provider=locationManager.getBestProvider(criteria, true);
    location=locationManager.getLastKnownLocation(provider);
    locationListener.onLocationChanged(location);

【问题讨论】：

我从 Gps 提供商那里获得价值，但希望通过被动或网络提供商访问。

你初始化locationmanager了吗？

我用 setSystemServices(Context.LOCATION_SERVICE) 方法初始化了

当我使用 Gps 运行我的代码时，它会为我提供经度和纬度，但是当我打开设备的 wifi 时，它只会为我提供被动提供者

和它不允许定位的被动提供者

【参考方案1】：

使用此代码初始化 locationmanager

locationManager = (LocationManager) getSystemService(mContext.LOCATION_SERVICE);