我希望你能在设置偏好中监听NFC启用/禁用,因此我在我的活动中添加了以下代码。
IntentFilter filter = new IntentFilter("android.nfc.action.ADAPTER_STATE_CHANGE");
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
tv.setText("broadcast received :" + NfcAdapter.getDefaultAdapter(MainActivity.this).isEnabled());
Toast.makeText(MainActivity.this, "broadcast received", Toast.LENGTH_LONG).show();
}
};
registerReceiver(receiver, filter);
但是看起来 ADAPTER_STATE_CHANGE 不起作用。
有人有监听 NFC 状态的想法吗?请帮忙!