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());
+        }
+    }
+}