How can one detect airplane mode on Android?

Solution 1:

/**
* Gets the state of Airplane Mode.
* 
* @param context
* @return true if enabled.
*/
private static boolean isAirplaneModeOn(Context context) {

   return Settings.System.getInt(context.getContentResolver(),
           Settings.Global.AIRPLANE_MODE_ON, 0) != 0;

}

Solution 2:

By extending Alex's answer to include SDK version checking we have:

/**
 * Gets the state of Airplane Mode.
 * 
 * @param context
 * @return true if enabled.
 */
@SuppressWarnings("deprecation")
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static boolean isAirplaneModeOn(Context context) {        
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
        return Settings.System.getInt(context.getContentResolver(), 
                Settings.System.AIRPLANE_MODE_ON, 0) != 0;          
    } else {
        return Settings.Global.getInt(context.getContentResolver(), 
                Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
    }       
}

Solution 3:

And if you don't want to poll if the Airplane Mode is active or not, you can register a BroadcastReceiver for the SERVICE_STATE Intent and react on it.

Either in your ApplicationManifest (pre-Android 8.0):

<receiver android:enabled="true" android:name=".ConnectivityReceiver">
    <intent-filter>
        <action android:name="android.intent.action.AIRPLANE_MODE"/>
    </intent-filter>
</receiver>

or programmatically (all Android versions):

IntentFilter intentFilter = new IntentFilter("android.intent.action.AIRPLANE_MODE");

BroadcastReceiver receiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
            Log.d("AirplaneMode", "Service state changed");
      }
};

context.registerReceiver(receiver, intentFilter);

And as described in the other solutions, you can poll the airplane mode when your receiver was notified and throw your exception.