Java 如何在android中显示未连接的internet

我需要帮助。我想干杯，以显示我的应用程序中的互联网状态。它适用于wifi和移动数据包（移动互联网）。但当互联网完全断开时，它什么也看不见。我不知道怎么做。这是我的密码

public class ConnectivityReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Log.d("myapp", "action: " + intent.getAction());
    ConnectivityManager cm =
            (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    boolean isConnected = activeNetwork != null &&
                          activeNetwork.isConnectedOrConnecting();

     if(isConnected)
     {
     if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
     {
         Toast toast = Toast.makeText(context, "Connected to wifi", Toast.LENGTH_LONG);
         toast.show();
     }
     else if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
     {
         Toast toast = Toast.makeText(context, "Connected to Mobile Data Pakage", Toast.LENGTH_LONG);
         toast.show();

     }
     else 
      {
         Toast toast = Toast.makeText(context, "Not Connected", Toast.LENGTH_LONG);
         toast.show();

      }

也可以尝试此操作，但编译器显示错误。请帮帮我。提前谢谢

 else if(activeNetwork.getType() == ConnectivityManager.EXTRA_NO_CONNECTIVITY)
      {
                                                                                  Toast toast = Toast.makeText(context, "Not Connected", Toast.LENGTH_LONG);
         toast.show();

宣言

 <receiver android:name="com.networkstatechange.ConnectivityReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        </intent-filter>
    </receiver>

---

如果缩进正确，您会看到您的吐司“未连接”仅在您输入块

if（isConnected）

时才会显示。这样重写：

 if(isConnected)
 {
   if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
   {
       Toast toast = Toast.makeText(context, "Connected to wifi", Toast.LENGTH_LONG);
       toast.show();
   }
   else if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
   {
       Toast toast = Toast.makeText(context, "Connected to Mobile Data Pakage", Toast.LENGTH_LONG);
       toast.show();

   }
 }
 else 
  {
     Toast toast = Toast.makeText(context, "Not Connected", Toast.LENGTH_LONG);
     toast.show();

  }
 }

---

如果缩进正确，您会看到只有在输入块

if（isConnected）

时才会显示吐司“notconnected”。这样重写：

 if(isConnected)
 {
   if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
   {
       Toast toast = Toast.makeText(context, "Connected to wifi", Toast.LENGTH_LONG);
       toast.show();
   }
   else if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
   {
       Toast toast = Toast.makeText(context, "Connected to Mobile Data Pakage", Toast.LENGTH_LONG);
       toast.show();

   }
 }
 else 
  {
     Toast toast = Toast.makeText(context, "Not Connected", Toast.LENGTH_LONG);
     toast.show();

  }
 }

试试这个

public static boolean checkConn(Context ctx) {
       ConnectivityManager conMgr = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo i = conMgr.getActiveNetworkInfo();
       if (i == null)
        return false;
        if (!i.isConnected())
        return false;
        if (!i.isAvailable())
        return false;
        return true;        
    }

也使用

试试这个

public static boolean checkConn(Context ctx) {
       ConnectivityManager conMgr = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo i = conMgr.getActiveNetworkInfo();
       if (i == null)
        return false;
        if (!i.isConnected())
        return false;
        if (!i.isAvailable())
        return false;
        return true;        
    }

也使用

---

公共类连接检测器{

private Context _context;

public ConnectionDetector(Context context){
    this._context = context;
}

public boolean isConnectingToInternet(){
    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (connectivity != null) 
      {
          NetworkInfo[] info = connectivity.getAllNetworkInfo();
          if (info != null) 
              for (int i = 0; i < info.length; i++) 
                  if (info[i].getState() == NetworkInfo.State.CONNECTED)
                  {
                      return true;
                  }

      }
      return false;
}

private Context\u Context；
公共连接检测器（上下文）{
这._context=context；
}
公共布尔值未连接到Internet（）{
ConnectivityManager connectivity=（ConnectivityManager）_context.getSystemService（context.connectivity_SERVICE）；
if（连接性！=null）
{
NetworkInfo[]info=connectivity.getAllNetworkInfo（）；
如果（信息！=null）
对于（int i=0；i

}

创建这个类

并在接收端使用“连接到internet”方法 它应该很好用

---

haply编码：）

公共类连接检测器{

private Context _context;

public ConnectionDetector(Context context){
    this._context = context;
}

public boolean isConnectingToInternet(){
    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (connectivity != null) 
      {
          NetworkInfo[] info = connectivity.getAllNetworkInfo();
          if (info != null) 
              for (int i = 0; i < info.length; i++) 
                  if (info[i].getState() == NetworkInfo.State.CONNECTED)
                  {
                      return true;
                  }

      }
      return false;
}

private Context\u Context；
公共连接检测器（上下文）{
这._context=context；
}
公共布尔值未连接到Internet（）{
ConnectivityManager connectivity=（ConnectivityManager）_context.getSystemService（context.connectivity_SERVICE）；
if（连接性！=null）
{
NetworkInfo[]info=connectivity.getAllNetworkInfo（）；
如果（信息！=null）
对于（int i=0；i

}

创建这个类

并在接收端使用“连接到internet”方法 它应该很好用

---

可能编码：）

使用

ACCESS\u NETWORK\u STATE

permission..检查我的答案..使用

ACCESS\u NETWORK\u STATE

permission..检查我的答案。。