Add event logs for NFC events. DO NOT MERGE

Bug: 5128799
Change-Id: I5607abe5d28ef9682afa084651c50aa651655b60

Android.mk

@@ -3,15 +3,33 @@ include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_SRC_FILES := \
+        $(call all-java-files-under, src)
 
 LOCAL_PACKAGE_NAME := Nfc
 LOCAL_CERTIFICATE := platform
 
+LOCAL_STATIC_JAVA_LIBRARIES := NfcLogTags
+
 LOCAL_JNI_SHARED_LIBRARIES := libnfc_jni
 
 LOCAL_PROGUARD_ENABLED := disabled
 
 include $(BUILD_PACKAGE)
 
+
+#####
+# static lib for the log tags
+#####
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := src/com/android/nfc/EventLogTags.logtags
+
+LOCAL_MODULE:= NfcLogTags
+
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+
 include $(call all-makefiles-under,$(LOCAL_PATH))

src/com/android/nfc/EventLogTags.logtags

+# See system/core/logcat/event.logtags for a description of the format of this file.
+
+option java_package com.android.nfc
+
+# logged on the first P2P sharing event
+90000 nfc_first_share
+# logged when a P2P transaction succeeds
+90001 nfc_share (size|1|2),(tnf|1),(type|3),(aar_present|1),(duration|1|3)
+# logged when a P2P transaction fails
+90002 nfc_share_fail (size|1|2),(tnf|1),(type|3),(aar_present|1)
+# data is either the URL or MIME type
+90003 nfc_ndef_received (size|1|2),(tnf|1),(type|3),(aar_present|1)

src/com/android/nfc/NfcService.java

@@ -90,12 +90,12 @@ public class NfcService extends Application implements DeviceHostListener {
 
     public static final String PREF = "NfcServicePrefs";
 
-    private static final String PREF_NFC_ON = "nfc_on";
-    private static final boolean NFC_ON_DEFAULT = true;
-    private static final String PREF_NDEF_PUSH_ON = "ndef_push_on";
-    private static final boolean NDEF_PUSH_ON_DEFAULT = true;
-
-    private static final String PREF_FIRST_BOOT = "first_boot";
+    static final String PREF_NFC_ON = "nfc_on";
+    static final boolean NFC_ON_DEFAULT = true;
+    static final String PREF_NDEF_PUSH_ON = "ndef_push_on";
+    static final boolean NDEF_PUSH_ON_DEFAULT = true;
+    static final String PREF_FIRST_BEAM = "first_beam";
+    static final String PREF_FIRST_BOOT = "first_boot";
 
     static final int MSG_NDEF_TAG = 0;
     static final int MSG_CARD_EMULATION = 1;

src/com/android/nfc/P2pLinkManager.java

@@ -25,6 +25,7 @@ import com.android.nfc.snep.SnepServer;
 import android.app.ActivityManager;
 import android.app.ActivityManager.RunningTaskInfo;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
@@ -36,6 +37,7 @@ import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Message;
 import android.os.RemoteException;
+import android.os.SystemClock;
 import android.provider.ContactsContract.Contacts;
 import android.provider.ContactsContract.Profile;
 import android.util.Log;
@@ -43,6 +45,8 @@ import android.util.Log;
 import java.io.FileDescriptor;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.nio.charset.Charsets;
+import java.util.Arrays;
 import java.util.List;
 
 /**
@@ -134,6 +138,8 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
     NdefMessage mStaticNdef;
     INdefPushCallback mCallbackNdef;
     SendTask mSendTask;
+    SharedPreferences mPrefs;
+    boolean mFirstBeam;
 
     public P2pLinkManager(Context context) {
         mNdefPushServer = new NdefPushServer(NDEFPUSH_SAP, mNppCallback);
@@ -147,6 +153,8 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
         mSendState = SEND_STATE_NOTHING_TO_SEND;
         mIsSendEnabled = false;
         mIsReceiveEnabled = false;
+        mPrefs = context.getSharedPreferences(NfcService.PREF, Context.MODE_PRIVATE);
+        mFirstBeam = mPrefs.getBoolean(NfcService.PREF_FIRST_BEAM, true);
      }
 
     /**
@@ -285,7 +293,14 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
          }
      }
 
-    void onSendComplete() {
+    void onSendComplete(NdefMessage msg, long elapsedRealtime) {
+        if (mFirstBeam) {
+            EventLogTags.writeNfcFirstShare();
+            mPrefs.edit().putBoolean(NfcService.PREF_FIRST_BEAM, false).apply();
+            mFirstBeam = false;
+        }
+        EventLogTags.writeNfcShare(getMessageSize(msg), getMessageTnf(msg), getMessageType(msg),
+                getMessageAarPresent(msg), (int) elapsedRealtime);
         // Make callbacks on UI thread
         mHandler.sendEmptyMessage(MSG_SEND_COMPLETE);
     }
@@ -319,6 +334,7 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
                 m = mMessageToSend;
             }
 
+            long time = SystemClock.elapsedRealtime();
             try {
                 if (DBG) Log.d(TAG, "Sending ndef via SNEP");
                 result = doSnepProtocol(m);
@@ -331,9 +347,12 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
 
                 result = new NdefPushClient().push(m);
             }
-            if (DBG) Log.d(TAG, "SendTask result=" + result);
+            time = SystemClock.elapsedRealtime() - time;
+
+            if (DBG) Log.d(TAG, "SendTask result=" + result + ", time ms=" + time);
+
             if (result) {
-                onSendComplete();
+                onSendComplete(m, time);
             }
             return null;
         }
@@ -382,6 +401,8 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
     };
 
     void onReceiveComplete(NdefMessage msg) {
+        EventLogTags.writeNfcNdefReceived(getMessageSize(msg), getMessageTnf(msg),
+                getMessageType(msg), getMessageAarPresent(msg));
         // Make callbacks on UI thread
         mHandler.obtainMessage(MSG_RECEIVE_COMPLETE, msg).sendToTarget();
     }
@@ -394,6 +415,11 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
                     if (mLinkState != LINK_STATE_DEBOUNCE) {
                         break;
                     }
+                    if (mSendState == SEND_STATE_SENDING) {
+                        EventLogTags.writeNfcShareFail(getMessageSize(mMessageToSend),
+                                getMessageTnf(mMessageToSend), getMessageType(mMessageToSend),
+                                getMessageAarPresent(mMessageToSend));
+                    }
                     if (DBG) Log.d(TAG, "Debounce timeout");
                     mLinkState = LINK_STATE_DOWN;
                     mSendState = SEND_STATE_NOTHING_TO_SEND;
@@ -439,6 +465,64 @@ public class P2pLinkManager implements Handler.Callback, P2pEventListener.Callba
         return true;
     }
 
+    int getMessageSize(NdefMessage msg) {
+        if (msg != null) {
+            return msg.toByteArray().length;
+        } else {
+            return 0;
+        }
+    }
+
+    int getMessageTnf(NdefMessage msg) {
+        if (msg == null) {
+            return NdefRecord.TNF_EMPTY;
+        }
+        NdefRecord records[] = msg.getRecords();
+        if (records == null || records.length == 0) {
+            return NdefRecord.TNF_EMPTY;
+        }
+        return records[0].getTnf();
+    }
+
+    String getMessageType(NdefMessage msg) {
+        if (msg == null) {
+            return "null";
+        }
+        NdefRecord records[] = msg.getRecords();
+        if (records == null || records.length == 0) {
+            return "null";
+        }
+        NdefRecord record = records[0];
+        switch (record.getTnf()) {
+            case NdefRecord.TNF_ABSOLUTE_URI:
+                // The actual URI is in the type field, don't log it
+                return "uri";
+            case NdefRecord.TNF_EXTERNAL_TYPE:
+            case NdefRecord.TNF_MIME_MEDIA:
+            case NdefRecord.TNF_WELL_KNOWN:
+                return new String(record.getType(), Charsets.UTF_8);
+            default:
+                return "unknown";
+        }
+    }
+
+    int getMessageAarPresent(NdefMessage msg) {
+        if (msg == null) {
+            return 0;
+        }
+        NdefRecord records[] = msg.getRecords();
+        if (records == null) {
+            return 0;
+        }
+        for (NdefRecord record : records) {
+            if (record.getTnf() == NdefRecord.TNF_EXTERNAL_TYPE &&
+                    Arrays.equals(NdefRecord.RTD_ANDROID_APP, record.getType())) {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
     @Override
     public void onP2pSendConfirmed() {
         if (DBG) Log.d(TAG, "onP2pSendConfirmed()");