1 files changed, 93 insertions, 0 deletions
diff --git a/main/src/cgeo/geocaching/network/AndroidBeam.java b/main/src/cgeo/geocaching/network/AndroidBeam.java
new file mode 100644
index 0000000..68b8f94
--- /dev/null
+++ b/main/src/cgeo/geocaching/network/AndroidBeam.java
@@ -0,0 +1,93 @@
+package cgeo.geocaching.network;
+
+import cgeo.geocaching.CgeoApplication;
+
+import org.apache.commons.io.Charsets;
+import org.apache.commons.lang3.StringUtils;
+import org.eclipse.jdt.annotation.Nullable;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcAdapter.CreateNdefMessageCallback;
+import android.nfc.NfcEvent;
+import android.os.Build;
+
+/**
+ * utility class managing all NFC related tasks
+ */
+public class AndroidBeam {
+
+    private AndroidBeam() {
+        // utility class
+    }
+
+    /**
+     * returns the URI transmitted via Android Beam, or the URI contained in the data of the intent
+     */
+    @Nullable
+    public static Uri getUri(final Intent intent) {
+        if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
+            final NdefMessage msg = (NdefMessage) intent.getExtras().getParcelableArray(NfcAdapter.EXTRA_NDEF_MESSAGES)[0];
+            return Uri.parse("http://" + new String(msg.getRecords()[0].getPayload(), Charsets.UTF_8));
+        }
+        return intent.getData();
+    }
+
+    // Do not support older devices than Android 4.0
+    // Although there even are 2.3 devices  (Nexus S)
+    // these are so few that we don't want to deal with the older (non Android Beam) API
+
+    public interface ActivitySharingInterface {
+        /** Return an URL that represent the current activity for sharing or null for no sharing. */
+        @Nullable
+        public String getAndroidBeamUri();
+    }
+
+    public static void enable(final Activity activity, final ActivitySharingInterface sharingInterface) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
+            initializeICSAndroidBeam(activity, createMessageCallback(sharingInterface));
+        }
+    }
+
+    public static void disable(final Activity activity) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
+            initializeICSAndroidBeam(activity, null);
+        }
+    }
+
+    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
+    private static void initializeICSAndroidBeam(final Activity activity, final CreateNdefMessageCallback messageCallback) {
+        final NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(activity);
+        if (nfcAdapter == null) {
+            return;
+        }
+        nfcAdapter.setNdefPushMessageCallback(messageCallback, activity);
+
+    }
+
+    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
+    private static CreateNdefMessageCallback createMessageCallback(final ActivitySharingInterface sharingInterface) {
+        return new NfcAdapter.CreateNdefMessageCallback() {
+            @Override
+            public NdefMessage createNdefMessage(final NfcEvent event) {
+                String uri = sharingInterface.getAndroidBeamUri();
+                if (uri == null) {
+                    return null;
+                }
+                // normalize our modified URLs for beaming
+                uri = StringUtils.replace(uri, "geocaching.com//", "geocaching.com/");
+                final NdefRecord[] records = {
+                        NdefRecord.createUri(uri),
+                        NdefRecord.createApplicationRecord(CgeoApplication.getInstance().getPackageName())
+                };
+                return new NdefMessage(records);
+            }
+        };
+    }
+
+}