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Commit 64a9435c authored by Pavlin Radoslavov's avatar Pavlin Radoslavov
Browse files

Added internal API to get/set the A2DP Active Device 

1. Call BluetoothA2dp.setActiveDevice(BluetoothDevice device) to set
   a connected A2DP device as active.
   The value of "device" could be null to clear the active device
   and stop streaming audio to a Bluetooth device.
2. Listen for BluetoothA2dp.ACTION_ACTIVE_DEVICE_CHANGED intent
   that will contain the latest active device (in EXTRA_DEVICE field).
   If the active device could not be changed, the EXTRA_DEVICE
   field could be null.
3. If setActiveDevice() is NOT in-progress, BluetoothA2dp.getActiveDevice()
   can be used. If setActiveDevice() is in-progress, the result is undefined.
4. BluetoothA2dp.setActiveDevice() could be called by some other parts of
   the system, so interested parties should always listen for
   BluetoothA2dp.ACTION_ACTIVE_DEVICE_CHANGED intents and prepared
   for active device updates.

Bug: 71555243
Test: Manual
Change-Id: I661b6882e8e6b437db50210aec1dd12a10199969
parent 0f05ce94

core/java/android/bluetooth/BluetoothA2dp.java

+88 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
package android.bluetooth;



import android.Manifest;

import android.annotation.Nullable;

import android.annotation.RequiresPermission;

import android.annotation.SdkConstant;

import android.annotation.SdkConstant.SdkConstantType;
@@ -102,6 +103,24 @@ public final class BluetoothA2dp implements BluetoothProfile { 
    public static final String ACTION_AVRCP_CONNECTION_STATE_CHANGED =

            "android.bluetooth.a2dp.profile.action.AVRCP_CONNECTION_STATE_CHANGED";



    /**

     * Intent used to broadcast the selection of a connected device as active.

     *

     * <p>This intent will have one extra:

     * <ul>

     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. It can

     * be null if no device is active. </li>

     * </ul>

     *

     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to

     * receive.

     *

     * @hide

     */

    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)

    public static final String ACTION_ACTIVE_DEVICE_CHANGED =

            "android.bluetooth.a2dp.profile.action.ACTIVE_DEVICE_CHANGED";



    /**

     * Intent used to broadcast the change in the Audio Codec state of the

     * A2DP Source profile.
@@ -424,6 +443,75 @@ public final class BluetoothA2dp implements BluetoothProfile { 
        }

    }



    /**

     * Select a connected device as active.

     *

     * The active device selection is per profile. An active device's

     * purpose is profile-specific. For example, A2DP audio streaming

     * is to the active A2DP Sink device. If a remote device is not

     * connected, it cannot be selected as active.

     *

     * <p> This API returns false in scenarios like the profile on the

     * device is not connected or Bluetooth is not turned on.

     * When this API returns true, it is guaranteed that the

     * {@link #ACTION_ACTIVE_DEVICE_CHANGED} intent will be broadcasted

     * with the active device.

     *

     * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}

     * permission.

     *

     * @param device the remote Bluetooth device. Could be null to clear

     * the active device and stop streaming audio to a Bluetooth device.

     * @return false on immediate error, true otherwise

     * @hide

     */

    public boolean setActiveDevice(@Nullable BluetoothDevice device) {

        if (DBG) log("setActiveDevice(" + device + ")");

        try {

            mServiceLock.readLock().lock();

            if (mService != null && isEnabled()

                    && ((device == null) || isValidDevice(device))) {

                return mService.setActiveDevice(device);

            }

            if (mService == null) Log.w(TAG, "Proxy not attached to service");

            return false;

        } catch (RemoteException e) {

            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));

            return false;

        } finally {

            mServiceLock.readLock().unlock();

        }

    }



    /**

     * Get the connected device that is active.

     *

     * <p>Requires {@link android.Manifest.permission#BLUETOOTH}

     * permission.

     *

     * @return the connected device that is active or null if no device

     * is active

     * @hide

     */

    @RequiresPermission(Manifest.permission.BLUETOOTH)

    @Nullable

    public BluetoothDevice getActiveDevice() {

        if (VDBG) log("getActiveDevice()");

        try {

            mServiceLock.readLock().lock();

            if (mService != null && isEnabled()) {

                return mService.getActiveDevice();

            }

            if (mService == null) Log.w(TAG, "Proxy not attached to service");

            return null;

        } catch (RemoteException e) {

            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));

            return null;

        } finally {

            mServiceLock.readLock().unlock();

        }

    }



    /**

     * Set priority of the profile

     *

core/res/AndroidManifest.xml

+2 −0
Original line number Diff line number Diff line
@@ -172,6 +172,8 @@ 
        android:name="android.bluetooth.headsetclient.profile.action.LAST_VTAG" />

    <protected-broadcast

        android:name="android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED" />

    <protected-broadcast

        android:name="android.bluetooth.a2dp.profile.action.ACTIVE_DEVICE_CHANGED" />

    <protected-broadcast

        android:name="android.bluetooth.a2dp.profile.action.PLAYING_STATE_CHANGED" />

    <protected-broadcast