c79e14a2fd
Test: atest Bug: 397951829 Flag: EXEMPT small fix Change-Id: I6450fc9cef1cfea3bb940e5d37a552df1f75dd23
92 lines
3.3 KiB
Java
92 lines
3.3 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.bluetooth;
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import android.bluetooth.BluetoothAdapter;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import androidx.annotation.VisibleForTesting;
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import com.android.settingslib.utils.ThreadUtils;
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/** Helper class, intended to be used by an Activity, to keep the local Bluetooth adapter in
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* discoverable mode indefinitely. By default setting the scan mode to
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* BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE will time out after some time, but some
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* Bluetooth settings pages would like to keep the device discoverable as long as the page is
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* visible. */
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public class AlwaysDiscoverable extends BroadcastReceiver {
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private static final String TAG = "AlwaysDiscoverable";
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private Context mContext;
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private BluetoothAdapter mBluetoothAdapter;
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private IntentFilter mIntentFilter;
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@VisibleForTesting
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boolean mStarted;
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public AlwaysDiscoverable(Context context) {
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mContext = context;
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mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
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mIntentFilter = new IntentFilter();
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mIntentFilter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
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}
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/** After calling start(), consumers should make a matching call to stop() when they no longer
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* wish to enforce discoverable mode. */
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public void start() {
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if (mStarted) {
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return;
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}
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mContext.registerReceiver(this, mIntentFilter,
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Context.RECEIVER_EXPORTED_UNAUDITED);
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mStarted = true;
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ThreadUtils.postOnBackgroundThread(() -> {
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if (mBluetoothAdapter.getScanMode()
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!= BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
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mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
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}
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});
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}
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public void stop() {
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if (!mStarted) {
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return;
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}
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mContext.unregisterReceiver(this);
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mStarted = false;
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ThreadUtils.postOnBackgroundThread(
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() -> mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE));
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}
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@Override
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public void onReceive(Context context, Intent intent) {
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String action = intent.getAction();
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if (action != BluetoothAdapter.ACTION_SCAN_MODE_CHANGED) {
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return;
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}
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ThreadUtils.postOnBackgroundThread(() -> {
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if (mBluetoothAdapter.getScanMode()
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!= BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
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mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
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}
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});
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}
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}
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