Persistent 'emergency calls' banner in the notification panel.

While carrier info (or SSID for devices without mobile data)
will still be shown in a floating text view at the bottom of
the notification shade, emergency-calls-only mode will now
be shown in the notification panel header so that it cannot
be obscured by notifications.

Change-Id: I714b6801be2b9b631b86b51d229440445eff5e76

packages/SystemUI/res/layout/status_bar_expanded.xml

@@ -40,24 +40,34 @@
         android:visibility="invisible"
         />
 
-    <FrameLayout
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="@dimen/close_handle_underlap"
+        android:orientation="vertical"
         >
 
         <include layout="@layout/status_bar_expanded_header"
             android:layout_width="match_parent"
             android:layout_height="@dimen/notification_panel_header_height"
             />
-     
+
+        <TextView
+            android:id="@+id/emergency_calls_only"
+            android:textAppearance="@style/TextAppearance.StatusBar.Expanded.Network.EmergencyOnly"
+            android:layout_height="wrap_content"
+            android:layout_width="match_parent"
+            android:paddingBottom="4dp"
+            android:gravity="center"
+            android:visibility="gone"
+            />
+
         <ScrollView
             android:id="@+id/scroll"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:fadingEdge="none"
-            android:overScrollMode="ifContentScrolls"
-            android:layout_marginTop="@dimen/notification_panel_header_height"
+            android:overScrollMode="always"
             >
             <com.android.systemui.statusbar.policy.NotificationRowLayout
                 android:id="@+id/latestItems"
@@ -66,7 +76,7 @@
                 systemui:rowHeight="@dimen/notification_row_min_height"
                 />
         </ScrollView>
-    </FrameLayout>
+    </LinearLayout>
 
     <com.android.systemui.statusbar.phone.CloseDragHandle android:id="@+id/close"
         android:layout_width="match_parent"

packages/SystemUI/res/values/styles.xml

@@ -67,6 +67,9 @@
         <item name="android:textColor">#999999</item>
 	</style>
 
+    <style name="TextAppearance.StatusBar.Expanded.Network.EmergencyOnly">
+    </style>
+
     <style name="Animation" />
 
     <style name="Animation.ShirtPocketPanel">

packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

@@ -182,6 +182,7 @@ public class PhoneStatusBar extends BaseStatusBar {
     private TextView mCarrierLabel;
     private boolean mCarrierLabelVisible = false;
     private int mCarrierLabelHeight;
+    private TextView mEmergencyCallLabel;
 
     // drag bar
     CloseDragHandle mCloseView;
@@ -409,14 +410,6 @@ public class PhoneStatusBar extends BaseStatusBar {
         mPile = (NotificationRowLayout)mStatusBarWindow.findViewById(R.id.latestItems);
         mPile.setLayoutTransitionsEnabled(false);
         mPile.setLongPressListener(getNotificationLongClicker());
-        if (SHOW_CARRIER_LABEL) {
-            mPile.setOnSizeChangedListener(new OnSizeChangedListener() {
-                @Override
-                public void onSizeChanged(View view, int w, int h, int oldw, int oldh) {
-                    updateCarrierLabelVisibility(false);
-                }
-            });
-        }
         mExpandedContents = mPile; // was: expanded.findViewById(R.id.notificationLinearLayout);
 
         mClearButton = mStatusBarWindow.findViewById(R.id.clear_all_button);
@@ -429,9 +422,6 @@ public class PhoneStatusBar extends BaseStatusBar {
         mSettingsButton.setOnClickListener(mSettingsButtonListener);
         mRotationButton = (RotationToggle) mStatusBarWindow.findViewById(R.id.rotation_lock_button);
         
-        mCarrierLabel = (TextView)mStatusBarWindow.findViewById(R.id.carrier_label);
-        mCarrierLabel.setVisibility(mCarrierLabelVisible ? View.VISIBLE : View.INVISIBLE);
-
         mScrollView = (ScrollView)mStatusBarWindow.findViewById(R.id.scroll);
         mScrollView.setVerticalScrollBarEnabled(false); // less drawing during pulldowns
 
@@ -460,7 +450,21 @@ public class PhoneStatusBar extends BaseStatusBar {
         mNetworkController.addSignalCluster(signalCluster);
         signalCluster.setNetworkController(mNetworkController);
 
+        mEmergencyCallLabel = (TextView)mStatusBarWindow.findViewById(R.id.emergency_calls_only);
+        if (mEmergencyCallLabel != null) {
+            mNetworkController.addEmergencyLabelView(mEmergencyCallLabel);
+            mEmergencyCallLabel.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
+                @Override
+                public void onLayoutChange(View v, int left, int top, int right, int bottom,
+                        int oldLeft, int oldTop, int oldRight, int oldBottom) {
+                    updateCarrierLabelVisibility(false);
+                }});
+        }
+
         if (SHOW_CARRIER_LABEL) {
+            mCarrierLabel = (TextView)mStatusBarWindow.findViewById(R.id.carrier_label);
+            mCarrierLabel.setVisibility(mCarrierLabelVisible ? View.VISIBLE : View.INVISIBLE);
+
             // for mobile devices, we always show mobile connection info here (SPN/PLMN)
             // for other devices, we show whatever network is connected
             if (mNetworkController.hasMobileDataFeature()) {
@@ -468,6 +472,14 @@ public class PhoneStatusBar extends BaseStatusBar {
             } else {
                 mNetworkController.addCombinedLabelView(mCarrierLabel);
             }
+
+            // set up the dynamic hide/show of the label
+            mPile.setOnSizeChangedListener(new OnSizeChangedListener() {
+                @Override
+                public void onSizeChanged(View view, int w, int h, int oldw, int oldh) {
+                    updateCarrierLabelVisibility(false);
+                }
+            });
         }
 
 //        final ImageView wimaxRSSI =
@@ -919,9 +931,11 @@ public class PhoneStatusBar extends BaseStatusBar {
             Slog.d(TAG, String.format("pileh=%d scrollh=%d carrierh=%d",
                     mPile.getHeight(), mScrollView.getHeight(), mCarrierLabelHeight));
         }
-        
-        final boolean makeVisible = 
-            mPile.getHeight() < (mScrollView.getHeight() - mCarrierLabelHeight);
+
+        final boolean emergencyCallsShownElsewhere = mEmergencyCallLabel != null;
+        final boolean makeVisible =
+            !(emergencyCallsShownElsewhere && mNetworkController.isEmergencyOnly())
+            && mPile.getHeight() < (mScrollView.getHeight() - mCarrierLabelHeight);
         
         if (force || mCarrierLabelVisible != makeVisible) {
             mCarrierLabelVisible = makeVisible;

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

@@ -145,6 +145,7 @@ public class NetworkController extends BroadcastReceiver {
     ArrayList<TextView> mCombinedLabelViews = new ArrayList<TextView>();
     ArrayList<TextView> mMobileLabelViews = new ArrayList<TextView>();
     ArrayList<TextView> mWifiLabelViews = new ArrayList<TextView>();
+    ArrayList<TextView> mEmergencyLabelViews = new ArrayList<TextView>();
     ArrayList<SignalCluster> mSignalClusters = new ArrayList<SignalCluster>();
     int mLastPhoneSignalIconId = -1;
     int mLastDataDirectionIconId = -1;
@@ -245,6 +246,10 @@ public class NetworkController extends BroadcastReceiver {
         return mHasMobileDataFeature;
     }
 
+    public boolean isEmergencyOnly() {
+        return (mServiceState != null && mServiceState.isEmergencyOnly());
+    }
+
     public void addPhoneSignalIconView(ImageView v) {
         mPhoneSignalIconViews.add(v);
     }
@@ -284,6 +289,10 @@ public class NetworkController extends BroadcastReceiver {
         mWifiLabelViews.add(v);
     }
 
+    public void addEmergencyLabelView(TextView v) {
+        mEmergencyLabelViews.add(v);
+    }
+
     public void addSignalCluster(SignalCluster cluster) {
         mSignalClusters.add(cluster);
         refreshSignalCluster(cluster);
@@ -917,7 +926,7 @@ public class NetworkController extends BroadcastReceiver {
         String wifiLabel = "";
         String mobileLabel = "";
         int N;
-        final boolean emergencyOnly = (mServiceState != null && mServiceState.isEmergencyOnly());
+        final boolean emergencyOnly = isEmergencyOnly();
 
         if (!mHasMobileDataFeature) {
             mDataSignalIconId = mPhoneSignalIconId = 0;
@@ -1079,6 +1088,7 @@ public class NetworkController extends BroadcastReceiver {
                     + " combinedActivityIconId=0x" + Integer.toHexString(combinedActivityIconId)
                     + " mobileLabel=" + mobileLabel
                     + " wifiLabel=" + wifiLabel
+                    + " emergencyOnly=" + emergencyOnly
                     + " combinedLabel=" + combinedLabel
                     + " mAirplaneMode=" + mAirplaneMode
                     + " mDataActivity=" + mDataActivity
@@ -1244,6 +1254,18 @@ public class NetworkController extends BroadcastReceiver {
                 v.setVisibility(View.VISIBLE);
             }
         }
+
+        // e-call label
+        N = mEmergencyLabelViews.size();
+        for (int i=0; i<N; i++) {
+            TextView v = mEmergencyLabelViews.get(i);
+            if (!emergencyOnly) {
+                v.setVisibility(View.GONE);
+            } else {
+                v.setText(mobileLabel); // comes from the telephony stack
+                v.setVisibility(View.VISIBLE);
+            }
+        }
     }
 
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {