Unhide Bluetooth Low Energy public APIs

Updated API headers. Add BluetoothManager to be retrieved by
context.getSystemService(Context.BLUETOOTH_SERVICE).
LE scan functions are placed in BluetoothAdapter
The GATT API are device driven instead of a profile-driver.
bug 8450158

Change-Id: I424a4cedaac3ef8120a05996500008dd210d2553

1 files changed, 219 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothManager.java b/framework/java/android/bluetooth/BluetoothManager.java
new file mode 100644
index 0000000000..19083b55da
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothManager.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.content.Context;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * High level manager used to obtain an instance of an {@link BluetoothAdapter}
+ * and to conduct overall Bluetooth Management.
+ * <p>
+ * Use {@link android.content.Context#getSystemService(java.lang.String)}
+ * with {@link Context#BLUETOOTH_SERVICE} to create an {@link BluetoothManager},
+ * then call {@link #getAdapter} to obtain the {@link BluetoothAdapter}.
+ * <p>
+ * Alternately, you can just call the static helper
+ * {@link BluetoothAdapter#getDefaultAdapter()}.
+ *
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For more information about using BLUETOOTH, read the
+ * <a href="{@docRoot}guide/topics/connectivity/bluetooth.html">Bluetooth</a> developer guide.</p>
+ * </div>
+ *
+ * @see Context#getSystemService
+ * @see BluetoothAdapter#getDefaultAdapter()
+ */
+public final class BluetoothManager {
+    private static final String TAG = "BluetoothManager";
+    private static final boolean DBG = true;
+    private static final boolean VDBG = true;
+
+    private final BluetoothAdapter mAdapter;
+
+    /**
+     * @hide
+     */
+    public BluetoothManager(Context context) {
+        context = context.getApplicationContext();
+        if (context == null) {
+            throw new IllegalArgumentException(
+                    "context not associated with any application (using a mock context?)");
+        }
+        // Legacy api - getDefaultAdapter does not take in the context
+        mAdapter = BluetoothAdapter.getDefaultAdapter();
+    }
+
+    /**
+     * Get the default BLUETOOTH Adapter for this device.
+     *
+     * @return the default BLUETOOTH Adapter
+     */
+    public BluetoothAdapter getAdapter() {
+        return mAdapter;
+    }
+
+    /**
+     * Get the current connection state of the profile to the remote device.
+     *
+     * <p>This is not specific to any application configuration but represents
+     * the connection state of the local Bluetooth adapter for certain profile.
+     * This can be used by applications like status bar which would just like
+     * to know the state of Bluetooth.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
+     *
+     * @param device Remote bluetooth device.
+     * @param profile GATT or GATT_SERVER
+     * @return State of the profile connection. One of
+     *         {@link BluetoothProfile#STATE_CONNECTED}, {@link BluetoothProfile#STATE_CONNECTING},
+     *         {@link BluetoothProfile#STATE_DISCONNECTED},
+     *         {@link BluetoothProfile#STATE_DISCONNECTING}
+     */
+    public int getConnectionState(BluetoothDevice device, int profile) {
+        if (DBG) Log.d(TAG,"getConnectionState()");
+
+        List<BluetoothDevice> connectedDevices = getConnectedDevices(profile);
+        for(BluetoothDevice connectedDevice : connectedDevices) {
+            if (device.equals(connectedDevice)) {
+                return BluetoothProfile.STATE_CONNECTED;
+            }
+        }
+
+        return BluetoothProfile.STATE_DISCONNECTED;
+    }
+
+    /**
+     * Get connected devices for the specified profile.
+     *
+     * <p> Return the set of devices which are in state {@link BluetoothProfile#STATE_CONNECTED}
+     *
+     * <p>This is not specific to any application configuration but represents
+     * the connection state of Bluetooth for this profile.
+     * This can be used by applications like status bar which would just like
+     * to know the state of Bluetooth.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
+     *
+     * @param profile GATT or GATT_SERVER
+     * @return List of devices. The list will be empty on error.
+     */
+    public List<BluetoothDevice> getConnectedDevices(int profile) {
+        if (DBG) Log.d(TAG,"getConnectedDevices");
+        if (profile != BluetoothProfile.GATT && profile != BluetoothProfile.GATT_SERVER) {
+            throw new IllegalArgumentException("Profile not supported: " + profile);
+        }
+
+        List<BluetoothDevice> connectedDevices = new ArrayList<BluetoothDevice>();
+
+        try {
+            IBluetoothManager managerService = mAdapter.getBluetoothManager();
+            IBluetoothGatt iGatt = (IBluetoothGatt) managerService.getBluetoothGatt();
+            if (iGatt == null) return connectedDevices;
+
+            connectedDevices = iGatt.getDevicesMatchingConnectionStates(
+                new int[] { BluetoothProfile.STATE_CONNECTED });
+        } catch (RemoteException e) {
+            Log.e(TAG,"",e);
+        }
+
+        return connectedDevices;
+    }
+
+    /**
+     * 
+     * Get a list of devices that match any of the given connection
+     * states.
+     *
+     * <p> If none of the devices match any of the given states,
+     * an empty list will be returned.
+     *
+     * <p>This is not specific to any application configuration but represents
+     * the connection state of the local Bluetooth adapter for this profile.
+     * This can be used by applications like status bar which would just like
+     * to know the state of the local adapter.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
+     *
+     * @param profile GATT or GATT_SERVER
+     * @param states Array of states. States can be one of
+     *        {@link BluetoothProfile#STATE_CONNECTED}, {@link BluetoothProfile#STATE_CONNECTING},
+     *        {@link BluetoothProfile#STATE_DISCONNECTED},
+     *        {@link BluetoothProfile#STATE_DISCONNECTING},
+     * @return List of devices. The list will be empty on error.
+     */
+    public List<BluetoothDevice> getDevicesMatchingConnectionStates(int profile, int[] states) {
+        if (DBG) Log.d(TAG,"getDevicesMatchingConnectionStates");
+
+        if (profile != BluetoothProfile.GATT && profile != BluetoothProfile.GATT_SERVER) {
+            throw new IllegalArgumentException("Profile not supported: " + profile);
+        }
+
+        List<BluetoothDevice> devices = new ArrayList<BluetoothDevice>();
+
+        try {
+            IBluetoothManager managerService = mAdapter.getBluetoothManager();
+            IBluetoothGatt iGatt = (IBluetoothGatt) managerService.getBluetoothGatt();
+            if (iGatt == null) return devices;
+            devices = iGatt.getDevicesMatchingConnectionStates(states);
+        } catch (RemoteException e) {
+            Log.e(TAG,"",e);
+        }
+
+        return devices;
+    }
+
+    /**
+     * Open a GATT Server
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as the results of any other GATT server operations.
+     * The method returns a BluetoothGattServer instance. You can use BluetoothGattServer
+     * to conduct GATT server operations.
+     * @param context App context
+     * @param callback GATT server callback handler that will receive asynchronous callbacks.
+     * @return BluetoothGattServer instance
+     */
+    public BluetoothGattServer openGattServer(Context context,
+                                              BluetoothGattServerCallback callback) {
+        if (context == null || callback == null) {
+            throw new IllegalArgumentException("null parameter: " + context + " " + callback);
+        }
+
+        // TODO(Bluetooth) check whether platform support BLE
+        //     Do the check here or in GattServer?
+
+        try {
+            IBluetoothManager managerService = mAdapter.getBluetoothManager();
+            IBluetoothGatt iGatt = (IBluetoothGatt) managerService.getBluetoothGatt();
+            if (iGatt == null) {
+                Log.e(TAG, "Fail to get GATT Server connection");
+                return null;
+            }
+            BluetoothGattServer mGattServer = new BluetoothGattServer(context, iGatt);
+            Boolean regStatus = mGattServer.registerCallback(callback);
+            return regStatus? mGattServer : null;
+        } catch (RemoteException e) {
+            Log.e(TAG,"",e);
+            return null;
+        }
+    }
+}