android: Improve ActivityStatus and add ChromiumActivity.

The ActivityStatus class used to track activity state changes is too basic
for some usage scenarios.

This patch does the following:

- Augment ActivityStatus with a new StateListener type that can be
  registered to listen to all activity state changes.

  Also add getActivity(), getState(), registerStateListener()
  and unregisterStateListener() as static method.

- Add a new ChromiumActivity class that all Chromium main activities
  should sub-class, to ensure that the ActivityStatus state is updated
  appropriately.

- Modify all main activities in the Chromium code base to extend
  from ChromiumActivity instead of Activity.

BUG=none


Review URL: https://chromiumcodereview.appspot.com/11419287

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171789 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 8 deletions

diff --git a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
index c5fd033..90aa753 100644
--- a/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
+++ b/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
@@ -21,7 +21,7 @@ import org.chromium.base.ActivityStatus;
  * ACCESS_NETWORK_STATE permission.
  */
 public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
-        implements ActivityStatus.Listener {
+        implements ActivityStatus.StateListener {
 
     /** Queries the ConnectivityManager for information about the current connection. */
     static class ConnectivityManagerDelegate {
@@ -73,11 +73,10 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
         mConnectivityManagerDelegate = new ConnectivityManagerDelegate(context);
         mConnectionType = currentConnectionType(context);
 
-        ActivityStatus status = ActivityStatus.getInstance();
-        if (!status.isPaused()) {
+        if (ActivityStatus.getState() != ActivityStatus.PAUSED) {
           registerReceiver();
         }
-        status.registerListener(this);
+        ActivityStatus.registerStateListener(this);
     }
 
     /**
@@ -168,12 +167,12 @@ public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
         }
     }
 
-    // AcitivityStatus.Listener
+    // ActivityStatus.StateListener
     @Override
-    public void onActivityStatusChanged(boolean isPaused) {
-        if (isPaused) {
+    public void onActivityStateChange(int state) {
+        if (state == ActivityStatus.PAUSED) {
             unregisterReceiver();
-        } else {
+        } else if (state == ActivityStatus.RESUMED) {
             registerReceiver();
         }
     }