Merge "update time while network is connected"

am: 465f8527dd

Change-Id: I863c775015079a21098efd32b570acf8a8b53efa

services/core/java/com/android/server/NetworkTimeUpdateService.java

@@ -26,6 +26,8 @@ import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.database.ContentObserver;
 import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.Network;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.HandlerThread;
@@ -73,6 +75,7 @@ public class NetworkTimeUpdateService extends Binder {
     private long mNitzTimeSetTime = NOT_SET;
     // TODO: Have a way to look up the timezone we are in
     private long mNitzZoneSetTime = NOT_SET;
+    private Network mDefaultNetwork = null;
 
     private Context mContext;
     private TrustedTime mTime;
@@ -82,6 +85,8 @@ public class NetworkTimeUpdateService extends Binder {
     private AlarmManager mAlarmManager;
     private PendingIntent mPendingPollIntent;
     private SettingsObserver mSettingsObserver;
+    private ConnectivityManager mCM;
+    private NetworkTimeUpdateCallback mNetworkTimeUpdateCallback;
     // The last time that we successfully fetched the NTP time.
     private long mLastNtpFetchTime = NOT_SET;
     private final PowerManager.WakeLock mWakeLock;
@@ -103,6 +108,7 @@ public class NetworkTimeUpdateService extends Binder {
         mContext = context;
         mTime = NtpTrustedTime.getInstance(context);
         mAlarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
+        mCM = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
         Intent pollIntent = new Intent(ACTION_POLL, null);
         mPendingPollIntent = PendingIntent.getBroadcast(mContext, POLL_REQUEST, pollIntent, 0);
 
@@ -123,13 +129,12 @@ public class NetworkTimeUpdateService extends Binder {
     public void systemRunning() {
         registerForTelephonyIntents();
         registerForAlarms();
-        registerForConnectivityIntents();
 
         HandlerThread thread = new HandlerThread(TAG);
         thread.start();
         mHandler = new MyHandler(thread.getLooper());
-        // Check the network time on the new thread
-        mHandler.obtainMessage(EVENT_POLL_NETWORK_TIME).sendToTarget();
+        mNetworkTimeUpdateCallback = new NetworkTimeUpdateCallback();
+        mCM.registerDefaultNetworkCallback(mNetworkTimeUpdateCallback, mHandler);
 
         mSettingsObserver = new SettingsObserver(mHandler, EVENT_AUTO_TIME_CHANGED);
         mSettingsObserver.observe(mContext);
@@ -152,15 +157,10 @@ public class NetworkTimeUpdateService extends Binder {
             }, new IntentFilter(ACTION_POLL));
     }
 
-    private void registerForConnectivityIntents() {
-        IntentFilter intentFilter = new IntentFilter();
-        intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
-        mContext.registerReceiver(mConnectivityReceiver, intentFilter);
-    }
-
     private void onPollNetworkTime(int event) {
-        // If Automatic time is not set, don't bother.
-        if (!isAutomaticTimeRequested()) return;
+        // If Automatic time is not set, don't bother. Similarly, if we don't
+        // have any default network, don't bother.
+        if (!isAutomaticTimeRequested() || mDefaultNetwork == null) return;
         mWakeLock.acquire();
         try {
             onPollNetworkTimeUnderWakeLock(event);
@@ -262,22 +262,6 @@ public class NetworkTimeUpdateService extends Binder {
         }
     };
 
-    /** Receiver for ConnectivityManager events */
-    private BroadcastReceiver mConnectivityReceiver = new BroadcastReceiver() {
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            String action = intent.getAction();
-            if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {
-                if (DBG) Log.d(TAG, "Received CONNECTIVITY_ACTION ");
-                // Don't bother checking if we have connectivity, NtpTrustedTime does that for us.
-                Message message = mHandler.obtainMessage(EVENT_NETWORK_CHANGED);
-                // Send with a short delay to make sure the network is ready for use
-                mHandler.sendMessageDelayed(message, NETWORK_CHANGE_EVENT_DELAY_MS);
-            }
-        }
-    };
-
     /** Handler to do the network accesses on */
     private class MyHandler extends Handler {
 
@@ -297,6 +281,21 @@ public class NetworkTimeUpdateService extends Binder {
         }
     }
 
+    private class NetworkTimeUpdateCallback extends NetworkCallback {
+        @Override
+        public void onAvailable(Network network) {
+            Log.d(TAG, String.format("New default network %s; checking time.", network));
+            mDefaultNetwork = network;
+            // Running on mHandler so invoke directly.
+            onPollNetworkTime(EVENT_NETWORK_CHANGED);
+        }
+
+        @Override
+        public void onLost(Network network) {
+            if (network.equals(mDefaultNetwork)) mDefaultNetwork = null;
+        }
+    }
+
     /** Observer to watch for changes to the AUTO_TIME setting */
     private static class SettingsObserver extends ContentObserver {