Add API for BLE_SCAN_ALWAYS_AVAILABLE feature.

Change-Id: I83e966d4db076db367ded71bfb50c39e57568156

3 files changed, 44 insertions, 0 deletions

diff --git a/api/system-current.txt b/api/system-current.txt
index 6838ec1..ae94a9c 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -6033,6 +6033,7 @@ package android.bluetooth {
     method public android.bluetooth.BluetoothDevice getRemoteDevice(byte[]);
     method public int getScanMode();
     method public int getState();
+    method public boolean isBleScanAlwaysAvailable();
     method public boolean isDiscovering();
     method public boolean isEnabled();
     method public boolean isMultipleAdvertisementSupported();
@@ -6049,6 +6050,7 @@ package android.bluetooth {
     field public static final java.lang.String ACTION_DISCOVERY_FINISHED = "android.bluetooth.adapter.action.DISCOVERY_FINISHED";
     field public static final java.lang.String ACTION_DISCOVERY_STARTED = "android.bluetooth.adapter.action.DISCOVERY_STARTED";
     field public static final java.lang.String ACTION_LOCAL_NAME_CHANGED = "android.bluetooth.adapter.action.LOCAL_NAME_CHANGED";
+    field public static final java.lang.String ACTION_REQUEST_BLE_SCAN_ALWAYS_AVAILABLE = "android.bluetooth.adapter.action.REQUEST_BLE_SCAN_ALWAYS_AVAILABLE";
     field public static final java.lang.String ACTION_REQUEST_DISCOVERABLE = "android.bluetooth.adapter.action.REQUEST_DISCOVERABLE";
     field public static final java.lang.String ACTION_REQUEST_ENABLE = "android.bluetooth.adapter.action.REQUEST_ENABLE";
     field public static final java.lang.String ACTION_SCAN_MODE_CHANGED = "android.bluetooth.adapter.action.SCAN_MODE_CHANGED";
diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java
index b8f4bf8..ee055a5 100644
--- a/core/java/android/bluetooth/BluetoothAdapter.java
+++ b/core/java/android/bluetooth/BluetoothAdapter.java
@@ -18,6 +18,7 @@ package android.bluetooth;
 
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.SystemApi;
 import android.bluetooth.le.BluetoothLeAdvertiser;
 import android.bluetooth.le.BluetoothLeScanner;
 import android.bluetooth.le.ScanCallback;
@@ -209,6 +210,23 @@ public final class BluetoothAdapter {
             "android.bluetooth.adapter.action.REQUEST_ENABLE";
 
     /**
+     * Activity Action: Show a system activity that allows user to enable BLE scans even when
+     * Bluetooth is turned off.<p>
+     *
+     * Notification of result of this activity is posted using
+     * {@link android.app.Activity#onActivityResult}. The <code>resultCode</code> will be
+     * {@link android.app.Activity#RESULT_OK} if BLE scan always available setting is turned on or
+     * {@link android.app.Activity#RESULT_CANCELED} if the user has rejected the request or an
+     * error occurred.
+     *
+     * @hide
+     */
+    @SystemApi
+    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
+    public static final String ACTION_REQUEST_BLE_SCAN_ALWAYS_AVAILABLE =
+            "android.bluetooth.adapter.action.REQUEST_BLE_SCAN_ALWAYS_AVAILABLE";
+
+    /**
      * Broadcast Action: Indicates the Bluetooth scan mode of the local Adapter
      * has changed.
      * <p>Always contains the extra fields {@link #EXTRA_SCAN_MODE} and {@link
@@ -919,6 +937,22 @@ public final class BluetoothAdapter {
     }
 
     /**
+     * Returns {@code true} if BLE scan is always available, {@code false} otherwise. <p>
+     *
+     * If this returns {@code true}, application can issue {@link BluetoothLeScanner#startScan} and
+     * fetch scan results even when Bluetooth is turned off.<p>
+     *
+     * To change this setting, use {@link #ACTION_REQUEST_BLE_SCAN_ALWAYS_AVAILABLE}.
+     *
+     * @hide
+     */
+    @SystemApi
+    public boolean isBleScanAlwaysAvailable() {
+        // TODO: implement after Settings UI change.
+        return false;
+    }
+
+    /**
      * Returns whether peripheral mode is supported.
      *
      * @hide
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 2647247..eeef2c2 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -5838,6 +5838,14 @@ public final class Settings {
                 "wifi_scan_always_enabled";
 
        /**
+        * Settings to allow BLE scans to be enabled even when Bluetooth is turned off for
+        * connectivity.
+        * @hide
+        */
+       public static final String BLE_SCAN_ALWAYS_AVAILABLE =
+               "ble_scan_always_enabled";
+
+       /**
         * Used to save the Wifi_ON state prior to tethering.
         * This state will be checked to restore Wifi after
         * the user turns off tethering.