blob: 7b948719721cb64001990bad8f2056177b91084c [file] [log] [blame]
/*
* Copyright (C) 2017 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 com.android.settings.bluetooth;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import androidx.annotation.VisibleForTesting;
/** Helper class, intended to be used by an Activity, to keep the local Bluetooth adapter in
* discoverable mode indefinitely. By default setting the scan mode to
* BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE will time out after some time, but some
* Bluetooth settings pages would like to keep the device discoverable as long as the page is
* visible. */
public class AlwaysDiscoverable extends BroadcastReceiver {
private static final String TAG = "AlwaysDiscoverable";
private Context mContext;
private BluetoothAdapter mBluetoothAdapter;
private IntentFilter mIntentFilter;
@VisibleForTesting
boolean mStarted;
public AlwaysDiscoverable(Context context) {
mContext = context;
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
}
/** After calling start(), consumers should make a matching call to stop() when they no longer
* wish to enforce discoverable mode. */
public void start() {
if (mStarted) {
return;
}
mContext.registerReceiver(this, mIntentFilter);
mStarted = true;
if (mBluetoothAdapter.getScanMode()
!= BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
}
}
public void stop() {
if (!mStarted) {
return;
}
mContext.unregisterReceiver(this);
mStarted = false;
mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE);
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action != BluetoothAdapter.ACTION_SCAN_MODE_CHANGED) {
return;
}
if (mBluetoothAdapter.getScanMode()
!= BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
}
}
}