Add LauncherProviderChangeListener

Change-Id: I2333a157c488cd048a860982cc675ed9cec626ae

3 files changed, 25 insertions, 2 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index f1ce23524..e3b30cb90 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -120,7 +120,7 @@ import java.util.concurrent.atomic.AtomicInteger;
  */
 public class Launcher extends Activity
         implements View.OnClickListener, OnLongClickListener, LauncherModel.Callbacks,
-                   View.OnTouchListener, PageSwitchListener {
+                   View.OnTouchListener, PageSwitchListener, LauncherProviderChangeListener {
     static final String TAG = "Launcher";
     static final boolean LOGD = false;
 
@@ -394,7 +394,7 @@ public class Launcher extends Activity
 
         LauncherAppState.setApplicationContext(getApplicationContext());
         LauncherAppState app = LauncherAppState.getInstance();
-
+        LauncherAppState.getLauncherProvider().setLauncherProviderChangeListener(this);
         // Determine the dynamic grid properties
         Point smallestSize = new Point();
         Point largestSize = new Point();
@@ -496,6 +496,9 @@ public class Launcher extends Activity
         }
     }
 
+    @Override
+    public void onLauncherProviderChange() { }
+
     protected void onUserLeaveHint() {
         super.onUserLeaveHint();
         sPausedFromUserAction = true;
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index e9e35958a..2a645255c 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -95,6 +95,8 @@ public class LauncherProvider extends ContentProvider {
     private static final String ACTION_APPWIDGET_DEFAULT_WORKSPACE_CONFIGURE =
             "com.android.launcher.action.APPWIDGET_DEFAULT_WORKSPACE_CONFIGURE";
 
+    private LauncherProviderChangeListener mListener;
+
     /**
      * {@link Uri} triggered at any registered {@link android.database.ContentObserver} when
      * {@link AppWidgetHost#deleteHost()} is called during database creation.
@@ -118,6 +120,10 @@ public class LauncherProvider extends ContentProvider {
         return mOpenHelper.wasNewDbCreated();
     }
 
+    public void setLauncherProviderChangeListener(LauncherProviderChangeListener listener) {
+        mListener = listener;
+    }
+
     @Override
     public String getType(Uri uri) {
         SqlArguments args = new SqlArguments(uri, null, null);
@@ -244,6 +250,9 @@ public class LauncherProvider extends ContentProvider {
 
         // always notify the backup agent
         LauncherBackupAgentHelper.dataChanged(getContext());
+        if (mListener != null) {
+            mListener.onLauncherProviderChange();
+        }
     }
 
     private void addModifiedTime(ContentValues values) {
diff --git a/src/com/android/launcher3/LauncherProviderChangeListener.java b/src/com/android/launcher3/LauncherProviderChangeListener.java
new file mode 100644
index 000000000..0de96fbc4
--- /dev/null
+++ b/src/com/android/launcher3/LauncherProviderChangeListener.java
@@ -0,0 +1,11 @@
+package com.android.launcher3;
+
+/**
+ * This class is a listener for {@link LauncherProvider} changes. It gets notified in the
+ * sendNotify method. This listener is needed because by default the Launcher suppresses
+ * standard data change callbacks.
+ */
+public interface LauncherProviderChangeListener {
+
+    public void onLauncherProviderChange();
+}