Tap & pay: change empty state UX and strings.

Bug: 10965661
Change-Id: Iee0b8bf111ef2105babb0912942f5c764b75ac59

res/layout/nfc_payment.xml

@@ -23,6 +23,18 @@
             android:visibility="gone"
             android:paddingTop="16dp"
             android:text="@string/nfc_payment_no_apps"/>
+        <TextView
+            android:id="@+id/nfc_payment_learn_more"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:clickable="true"
+            android:textSize="20sp"
+            android:textStyle="italic"
+            android:visibility="gone"
+            android:textColor="@android:color/holo_blue_light"
+            android:paddingTop="16dp"
+            android:text="@string/nfc_payment_learn_more"/>
     </LinearLayout>
     <ListView
         android:id="@android:id/list"

res/values/strings.xml

@@ -4757,7 +4757,10 @@
     <!-- NFC payment settings --><skip/>
     <string name="nfc_payment_settings_title">Tap &amp; pay</string>
     <!-- String shown when there are no NFC payment applications installed -->
-    <string name="nfc_payment_no_apps">You have no apps configured for tap &amp; pay with NFC.</string>
+    <string name="nfc_payment_no_apps">Pay with just a tap</string>
+    <!-- String shown when there are no NFC payment applications installed, clickable, pointing to
+         a website to learn more-->
+    <string name="nfc_payment_learn_more">Learn more</string>
     <string name="nfc_payment_menu_item_add_service">Find apps</string>
     <!-- Label for the dialog that is shown when the user is asked to set a
          preferred payment application -->
@@ -4809,6 +4812,8 @@
     <string name="help_url_location_access" translatable="false"></string>
     <!-- Help URL, Security settings [DO NOT TRANSLATE] -->
     <string name="help_url_security" translatable="false"></string>
+    <!-- Help URL, Tap & pay [DO NOT TRANSLATE] -->
+    <string name="help_url_nfc_payment" translatable="false"></string>
 
     <!-- User account title [CHAR LIMIT=30] -->
     <string name="user_account_title">Account for content</string>

src/com/android/settings/HelpUtils.java

@@ -109,7 +109,7 @@ public class HelpUtils {
      * of the app's package as gotten via the context.
      * @return the uri with added query parameters
      */
-    private static Uri uriWithAddedParameters(Context context, Uri baseUri) {
+    public static Uri uriWithAddedParameters(Context context, Uri baseUri) {
         Uri.Builder builder = baseUri.buildUpon();
 
         // Add in the preferred language

src/com/android/settings/nfc/PaymentSettings.java

@@ -25,6 +25,7 @@ import android.os.Message;
 import android.preference.Preference;
 import android.preference.PreferenceManager;
 import android.preference.PreferenceScreen;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -38,6 +39,7 @@ import android.widget.RadioButton;
 import android.widget.TextView;
 
 import com.android.internal.content.PackageMonitor;
+import com.android.settings.HelpUtils;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settings.nfc.PaymentBackend.PaymentAppInfo;
@@ -49,7 +51,6 @@ public class PaymentSettings extends SettingsPreferenceFragment implements
     public static final String TAG = "PaymentSettings";
     private LayoutInflater mInflater;
     private PaymentBackend mPaymentBackend;
-
     private final PackageMonitor mSettingsPackageMonitor = new SettingsPackageMonitor();
 
 
@@ -57,7 +58,6 @@ public class PaymentSettings extends SettingsPreferenceFragment implements
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
 
-        setHasOptionsMenu(false);
         mPaymentBackend = new PaymentBackend(getActivity());
         mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         setHasOptionsMenu(true);
@@ -83,13 +83,18 @@ public class PaymentSettings extends SettingsPreferenceFragment implements
             }
         }
         TextView emptyText = (TextView) getView().findViewById(R.id.nfc_payment_empty_text);
+        TextView learnMore = (TextView) getView().findViewById(R.id.nfc_payment_learn_more);
         ImageView emptyImage = (ImageView) getView().findViewById(R.id.nfc_payment_tap_image);
         if (screen.getPreferenceCount() == 0) {
             emptyText.setVisibility(View.VISIBLE);
+            learnMore.setVisibility(View.VISIBLE);
             emptyImage.setVisibility(View.VISIBLE);
+            getListView().setVisibility(View.GONE);
         } else {
             emptyText.setVisibility(View.GONE);
+            learnMore.setVisibility(View.GONE);
             emptyImage.setVisibility(View.GONE);
+            getListView().setVisibility(View.VISIBLE);
         }
         setPreferenceScreen(screen);
     }
@@ -99,6 +104,24 @@ public class PaymentSettings extends SettingsPreferenceFragment implements
             Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         View v = mInflater.inflate(R.layout.nfc_payment, container, false);
+        TextView learnMore = (TextView) v.findViewById(R.id.nfc_payment_learn_more);
+        learnMore.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                String helpUrl;
+                if (!TextUtils.isEmpty(helpUrl = getResources().getString(
+                        R.string.help_url_nfc_payment))) {
+                    final Uri fullUri = HelpUtils.uriWithAddedParameters(
+                            PaymentSettings.this.getActivity(), Uri.parse(helpUrl));
+                    Intent intent = new Intent(Intent.ACTION_VIEW, fullUri);
+                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                            | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+                    startActivity(intent);
+                } else {
+                    Log.e(TAG, "Help url not set.");
+                }
+            }
+        });
         return v;
     }