Bluetooth messages improved.

Tap to pair in place of searching. Message when no device is found.

Change-Id: I0a4b1fa140e8a30b154ae2686e9c75d3768fc44e

res/values/strings.xml

@@ -237,7 +237,11 @@
     <!--Bluetooth settings screen, summary text under individual Bluetooth devices that are hands free or a headset -->
     <string name="bluetooth_device">handsfree/headset</string>
     <!--Bluetooth settings screen, text that appears in heading bar when scanning for devices -->
-    <string name="progress_scanning">Scanning</string>
+    <string name="progress_scanning">Searching</string>
+    <!--Bluetooth settings screen, text that appears in heading bar when scanning for devices is finished, indicating that user can tap on a device to pair with it [CHAR LIMIT=20]-->
+    <string name="progress_tap_to_pair">Tap to pair</string>
+    <!--Bluetooth settings screen, text that appears when scanning for devices is finished and no nearby bluetooth device was found [CHAR LIMIT=40]-->
+    <string name="bluetooth_no_devices_found">No Bluetooth devices were found nearby.</string>
     <!-- Notification ticker text (shown in the status bar) when a Bluetooth device wants to pair with us -->
     <string name="bluetooth_notif_ticker">Bluetooth pairing request</string>
     <!-- Notification title when a Bluetooth device wants to pair with us -->
@@ -936,8 +940,10 @@
 
     <!-- Bluetooth settings: The title of the preference (list item) that initiates a scan for devices -->
     <string name="bluetooth_preference_scan_title">Scan for devices</string>
-    <!-- Bluetooth settings: The title of the action button that initiates a scan for nearby devices [CHAR LIMIT=20] -->
+    <!-- Bluetooth settings: The title of the action button that initiates a search for nearby devices [CHAR LIMIT=20] -->
-    <string name="bluetooth_scan_nearby_devices">Scan</string>
+    <string name="bluetooth_search_for_devices">Search for devices</string>
+    <!-- Bluetooth settings: The title of the action button while a search for nearby devices is in progress [CHAR LIMIT=20] -->
+    <string name="bluetooth_searching_for_devices">Searching\u2026</string>
     <!-- Bluetooth settings: The sub heading for device settings. [CHAR LIMIT=30] -->
     <string name="bluetooth_preference_device_settings">Device settings</string>
     <!-- Bluetooth settings: The sub heading for paired devices. [CHAR LIMIT=30] -->

src/com/android/settings/ProgressCategory.java

@@ -17,12 +17,15 @@
 package com.android.settings;
 
 import android.content.Context;
+import android.preference.Preference;
 import android.util.AttributeSet;
 import android.view.View;
+import android.widget.TextView;
 
 public class ProgressCategory extends ProgressCategoryBase {
 
     private boolean mProgress = false;
+    private Preference mNoDeviceFoundPreference;
 
     public ProgressCategory(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -32,12 +35,27 @@ public class ProgressCategory extends ProgressCategoryBase {
     @Override
     public void onBindView(View view) {
         super.onBindView(view);
-        final View textView = view.findViewById(R.id.scanning_text);
+        final TextView textView = (TextView) view.findViewById(R.id.scanning_text);
         final View progressBar = view.findViewById(R.id.scanning_progress);
 
-        final int visibility = mProgress ? View.VISIBLE : View.INVISIBLE;
+        textView.setText(mProgress ? R.string.progress_scanning : R.string.progress_tap_to_pair);
-        textView.setVisibility(visibility);
+        boolean noDeviceFound = getPreferenceCount() == 0;
-        progressBar.setVisibility(visibility);
+        textView.setVisibility(noDeviceFound ? View.INVISIBLE : View.VISIBLE);
+        progressBar.setVisibility(mProgress ? View.VISIBLE : View.INVISIBLE);
+
+        if (mProgress) {
+            if (mNoDeviceFoundPreference != null) {
+                removePreference(mNoDeviceFoundPreference);
+            }
+        } else {
+            if (noDeviceFound) {
+                if (mNoDeviceFoundPreference == null) {
+                    mNoDeviceFoundPreference = new Preference(getContext());
+                    mNoDeviceFoundPreference.setSummary(R.string.bluetooth_no_devices_found);
+                }
+                addPreference(mNoDeviceFoundPreference);
+            }
+        }
     }
 
     @Override

src/com/android/settings/bluetooth/BluetoothSettings.java

@@ -101,9 +101,12 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment {
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         boolean bluetoothIsEnabled = mLocalAdapter.getBluetoothState() == BluetoothAdapter.STATE_ON;
-        menu.add(Menu.NONE, MENU_ID_SCAN, 0, R.string.bluetooth_scan_nearby_devices)
+        boolean isDiscovering = mLocalAdapter.isDiscovering();
+        int textId = isDiscovering ? R.string.bluetooth_searching_for_devices :
+            R.string.bluetooth_search_for_devices;
+        menu.add(Menu.NONE, MENU_ID_SCAN, 0, textId)
                 //.setIcon(R.drawable.ic_menu_scan_network)
-                .setEnabled(bluetoothIsEnabled && !mLocalAdapter.isDiscovering())
+                .setEnabled(bluetoothIsEnabled && !isDiscovering)
                 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
         menu.add(Menu.NONE, MENU_ID_ADVANCED, 0, R.string.bluetooth_menu_advanced)
                 //.setIcon(android.R.drawable.ic_menu_manage)
@@ -218,7 +221,7 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment {
     @Override
     public void onScanningStateChanged(boolean started) {
         super.onScanningStateChanged(started);
-        // Update 'Scan' option enabled state
+        // Update options' enabled state
         getActivity().invalidateOptionsMenu();
     }