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Diffstat (limited to 'core/java/android/nfc/NfcFragment.java')
-rw-r--r-- | core/java/android/nfc/NfcFragment.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/core/java/android/nfc/NfcFragment.java b/core/java/android/nfc/NfcFragment.java new file mode 100644 index 0000000..c48859b --- /dev/null +++ b/core/java/android/nfc/NfcFragment.java @@ -0,0 +1,83 @@ +/* + * 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()); + } + } +} |