To detect if WiFi Connection is available we need to use ConnectivityManager and NetworkInfo class,
We can create a method checkWifiStatus() that returns a boolean value true if Wifi is available.
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_main);
Toast.makeText(MainActivity.this, "Wifi connected : " + checkWifiStatus(), Toast.LENGTH_SHORT).show();
}
public boolean checkWifiStatus() {
ConnectivityManager connManager = (ConnectivityManager) (MainActivity.this).getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
return networkInfo.isConnected();
}
}
You need to pass the Context if you have this method in other class.
public boolean checkWifiStatus(Context context) {
ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
return networkInfo.isConnected();
}
Important: Don't forget to user permission in AndroidManifest.xml,
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
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