Add Bluetooth Checks to Service

This change adds two bluetooth checks. 1 is to determine if the hardware has bluetooth capabilities. 2 is to determine if bluetooth is on for the device. Both conditions must be met for the PhysicalWebSharing feature to be enabled.

BUG=685856

Review-Url: https://codereview.chromium.org/2737393003
Cr-Commit-Position: refs/heads/master@{#456216}

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java

@@ -4,6 +4,10 @@
 
 package org.chromium.chrome.browser.physicalweb;
 
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
@@ -153,4 +157,28 @@ public class PhysicalWeb {
                 new Intent(Intent.ACTION_VIEW, Uri.parse(UrlConstants.PHYSICAL_WEB_URL))
                         .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
     }
+
+    /**
+     * Check if bluetooth is on and enabled.
+     */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public static boolean bluetoothIsEnabled() {
+        Context context = ContextUtils.getApplicationContext();
+        BluetoothManager bluetoothManager =
+                (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);
+        BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
+        return bluetoothAdapter != null && bluetoothAdapter.isEnabled();
+    }
+
+    /**
+     * Check if the device bluetooth hardware supports BLE advertisements.
+     */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public static boolean hasBleAdvertiseCapability() {
+        Context context = ContextUtils.getApplicationContext();
+        BluetoothManager bluetoothManager =
+                (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);
+        BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
+        return bluetoothAdapter != null && bluetoothAdapter.getBluetoothLeAdvertiser() != null;
+    }
 }

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebShareActivity.java

@@ -26,11 +26,15 @@ public class PhysicalWebShareActivity extends ShareActivity {
     /**
      * Returns whether we should show this sharing option in the share sheet.
      * Pre-conditions for Physical Web Sharing to be enabled:
+     *      Device has hardware BLE advertising capabilities.
+     *      Device had Bluetooth on.
      *      Device is Marshmallow or above.
      *      Device has sharing feature enabled.
      * @return {@code true} if the feature should be enabled.
      */
     public static boolean featureIsAvailable() {
-        return PhysicalWeb.sharingIsEnabled() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return false;
+        return PhysicalWeb.hasBleAdvertiseCapability() && PhysicalWeb.bluetoothIsEnabled()
+                && PhysicalWeb.sharingIsEnabled();
     }
 }