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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.nfc;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
/**
* Used by {@link NfcActivityManager} to attach to activity life-cycle.
* @hide
*/
public final class NfcFragment extends Fragment {
static final String FRAGMENT_TAG = "android.nfc.NfcFragment";
// only used on UI thread
static boolean sIsInitialized = false;
static NfcActivityManager sNfcActivityManager;
/**
* Attach NfcFragment to an activity (if not already attached).
*/
public static void attach(Activity activity) {
FragmentManager manager = activity.getFragmentManager();
if (manager.findFragmentByTag(FRAGMENT_TAG) == null) {
manager.beginTransaction().add(new NfcFragment(), FRAGMENT_TAG).commit();
}
}
/**
* Remove NfcFragment from activity.
*/
public static void remove(Activity activity) {
FragmentManager manager = activity.getFragmentManager();
Fragment fragment = manager.findFragmentByTag(FRAGMENT_TAG);
if (fragment != null) {
manager.beginTransaction().remove(fragment).commit();
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!sIsInitialized) {
sIsInitialized = true;
NfcAdapter adapter = NfcAdapter.getDefaultAdapter(
activity.getApplicationContext());
if (adapter != null) {
sNfcActivityManager = adapter.mNfcActivityManager;
}
}
}
@Override
public void onResume() {
super.onResume();
if (sNfcActivityManager != null) {
sNfcActivityManager.onResume(getActivity());
}
}
@Override
public void onPause() {
super.onPause();
if (sNfcActivityManager != null) {
sNfcActivityManager.onPause(getActivity());
}
}
}
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