Merge "No QS hotspot unless supported" into nyc-dev

packages/SystemUI/src/com/android/systemui/qs/tiles/HotspotTile.java

@@ -42,6 +42,11 @@ public class HotspotTile extends QSTile<QSTile.BooleanState> {
         mController = host.getHotspotController();
     }
 
+    @Override
+    public boolean isAvailable() {
+        return mController.isHotspotSupported();
+    }
+
     @Override
     protected void handleDestroy() {
         super.handleDestroy();

packages/SystemUI/src/com/android/systemui/statusbar/policy/HotspotController.java

@@ -21,6 +21,7 @@ public interface HotspotController {
     void removeCallback(Callback callback);
     boolean isHotspotEnabled();
     void setHotspotEnabled(boolean enabled);
+    boolean isHotspotSupported();
 
     public interface Callback {
         void onHotspotChanged(boolean enabled);

packages/SystemUI/src/com/android/systemui/statusbar/policy/HotspotControllerImpl.java

@@ -46,6 +46,12 @@ public class HotspotControllerImpl implements HotspotController {
                 Context.CONNECTIVITY_SERVICE);
     }
 
+    @Override
+    public boolean isHotspotSupported() {
+        return mConnectivityManager.isTetheringSupported()
+                && mConnectivityManager.getTetherableWifiRegexs().length != 0;
+    }
+
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         pw.println("HotspotController state:");
         pw.print("  mHotspotEnabled="); pw.println(stateToString(mHotspotState));