Android development to obtain network link status

Web development is a very important part of Android programming. Today, this article will share 1 point of Android web development experience with you.

This paper illustrates Android's method of obtaining network link status through an example. The details are as follows:

With current Android phones, there are five possible network states:

-- No network (this may be because the phone is down, the network is not on, the signal is not good, etc.)

-- Use WIFI

--CMWAP(China Mobile Agent)

- CMNET surf the Internet

- 2 G G / 3/4 G surf the Internet

There are many times when we need to determine whether the user has network Settings on, and we usually use the ConnectivityManager class to determine whether a network connection exists.

Access to network status:

So how do you actually use this class? How do you interact with users? Specific examples are as follows:

public class MainActivity extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ConnectivityManager nw = (ConnectivityManager)this.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netinfo = nw.getActiveNetworkInfo();
    Toast.makeText(MainActivity.this, " The current network "+add(netinfo.isAvailable())+","+" network "+app(netinfo.isConnected())+","+" The network connection "+adp(netinfo.isConnected()), Toast.LENGTH_LONG).show();// Prompt the user for network status 
  }
  String add(Boolean bl){
    String s = " Do not use ";
    if(bl==true){
      s=" available ";
    }
    return s;
  }
  String app(Boolean bl){
    String s = " Not connected ";
    if(bl==true){
      s=" The connected ";
    }
    return s;
  }
  String adp(Boolean bl){
    String s = " Does not exist! ";
    if(bl==true){
      s=" There! ";
    }
    return s;
  }  
}

Of course, don't forget to get network permissions in the configuration file. The code is as follows:

<!--  Access to network  -->
  <uses-permission 
    android:name="android.permission.ACCESS_NETWORK_STATE"
    />

I hope the examples in this article have been helpful in Android programming.