Question

I am programming a service that runs when you boot the phone, but you need an Internet connection and connection to send SMS operator. I wrote a function to ConnectionManager as in other post appears, but I always get the same answer: NullPointerException, when I do the following:

页: 1

NetworkInfo NetInfo = cm.getNetworkInfo();

不是因为这种情况?

我怎么能够确定这一点?

如果我没有制定所有法典,那么我会问:

I have the following in the OnStart () method of a service that is activated by ACTION_BOOT_COMPLETED ...

@ Override
public void OnStart (Intent intent, int start) {

    Context aplCtx = getApplicationContext ();


    IsConnected boolean = false;
    while (! IsConnected) {
        try {
            IsConnected = IsOnline (aplCtx);

        } Catch (Exception e) {
            Log.d (e.toString ());
        }
    }

    .....  
}

private boolean IsOnline (Context ctx) {

    boolean result = false;

    try {
        ConnectivityManager cm = (ConnectivityManager) ctx.getSystemService     (Context.CONNECTIVITY_SERVICE);
        cm.getActiveNetworkInfo NetworkInfo ni = ();

        if (ni! = null) {
           if (ni.getState () == NetworkInfo.State.CONNECTED) {
               result = true;
           }
        }
        return result;
}

Since this is a background function and after starting the Smartphone, the operating system to force kill the process, before we get an Internet connection. How I can resolve this?, How do I get the operating system does not kill the process and have an Internet connection to perform the following actions?

Answer 1

Without your code, We can t say anything what going wrong,

但是,如果你不犯错误,那么我会利用这个网络。

public static boolean netConnect(Context ctx){
    ConnectivityManager cm ; 
    NetworkInfo info = null;

    try {
        cm = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
        info = cm.getActiveNetworkInfo();        

    } catch (Exception e) {
        Log.e("connectivity", e.toString());
    }

    if(info != null){
          return info.isConnected();
    }else{
        return false;
    }
}

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