I hope most of you know about NFC (Near Field Communication). It's an innovative version of RFID to read and write a small chunk of information by using the electromagnetic field.
More information: http://developer.android.com/guide/topics/connectivity/nfc/index.html
In this post, I am going to explain how to turn ON/OFF NFC by using the android APIs.
Google has some restrictions on Nfc power on/off for developers. Obviously, we know it is a user feature to turn on/off by android system setting menu.
We need to specify all below permissions in AndroidManifest.xml
<uses-permission android:name="android.permission.NFC" >
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" >
<uses-feature android:name="android.hardware.nfc" android:required="false" >Implementation for turn on/off a device
public static boolean powerNfc(boolean isOn, Context context) {
boolean success = false;
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(context);
if (nfcAdapter != null) {
Class NfcManagerClass;
Method setNfcEnabled;
try {
NfcManagerClass = Class.forName(nfcAdapter.getClass().getName());
setNfcEnabled = NfcManagerClass.getDeclaredMethod(isOn
? "enable" : "disable");
setNfcEnabled.setAccessible(true);
success = (Boolean) setNfcEnabled.invoke(nfcAdapter);
} catch (ClassNotFoundException e) {
Log.e(TAG, Log.getStackTraceString(e));
} catch (NoSuchMethodException e) {
Log.e(TAG, Log.getStackTraceString(e));
} catch (IllegalArgumentException e) {
Log.e(TAG, Log.getStackTraceString(e));
} catch (IllegalAccessException e) {
Log.e(TAG, Log.getStackTraceString(e));
} catch (InvocationTargetException e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
return success;
}This is a public method, so we don't need to access this by using any reflection techniques. So simply you could call the method from an adapter object.
public static boolean checkNfcPowerStatus(Context context) {
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(context);
boolean enabled = false;
if (nfcAdapter != null) {
enabled = nfcAdapter.isEnabled();
}
return enabled;
}