Add a new section to show eligible Fast Pair devices.
The section only show at most 3 devices. If the device list size is greater than 3, we will show a "See all". The device Preference is ordered. FastPairDeviceUpdater will handle the order logic. Bug: 296507968 Test: FastPairDevicePreferenceControllerTest Change-Id: I9692d5740dbc31ff50db0ebbf2c5535b726277c9
This commit is contained in:
Yiyi Shen
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/*
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* Copyright (C) 2023 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.connecteddevice.fastpair;
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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 android.content.pm.PackageManager;
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import android.util.Log;
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import androidx.annotation.NonNull;
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import androidx.annotation.VisibleForTesting;
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import androidx.lifecycle.DefaultLifecycleObserver;
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import androidx.lifecycle.LifecycleOwner;
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import androidx.preference.Preference;
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import androidx.preference.PreferenceGroup;
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import androidx.preference.PreferenceScreen;
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import com.android.settings.connecteddevice.DevicePreferenceCallback;
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import com.android.settings.core.BasePreferenceController;
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import com.android.settings.flags.Flags;
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import com.android.settings.overlay.FeatureFactory;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Controller to maintain the {@link PreferenceGroup} for all Fast Pair devices and a "See all"
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* Preference. It uses {@link DevicePreferenceCallback} to add/remove {@link Preference}.
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*/
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public class FastPairDevicePreferenceController extends BasePreferenceController
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implements DefaultLifecycleObserver, DevicePreferenceCallback {
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private static final String TAG = "FastPairDevicePrefCtr";
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private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
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private static final int MAX_DEVICE_NUM = 3;
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private static final String KEY_SEE_ALL = "fast_pair_devices_see_all";
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private final List<Preference> mPreferenceList = new ArrayList<>();
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private PreferenceGroup mPreferenceGroup;
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private FastPairDeviceUpdater mFastPairDeviceUpdater;
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private BluetoothAdapter mBluetoothAdapter;
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@VisibleForTesting Preference mSeeAllPreference;
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@VisibleForTesting IntentFilter mIntentFilter;
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@VisibleForTesting
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BroadcastReceiver mReceiver =
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new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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updatePreferenceVisibility();
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}
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};
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public FastPairDevicePreferenceController(Context context, String preferenceKey) {
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super(context, preferenceKey);
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if (Flags.enableSubsequentPairSettingsIntegration()) {
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FastPairFeatureProvider fastPairFeatureProvider =
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FeatureFactory.getFeatureFactory().getFastPairFeatureProvider();
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mFastPairDeviceUpdater =
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fastPairFeatureProvider.getFastPairDeviceUpdater(context, this);
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} else {
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mFastPairDeviceUpdater = null;
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}
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mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
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mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
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}
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@Override
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public void onStart(@NonNull LifecycleOwner owner) {
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if (mFastPairDeviceUpdater != null) {
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mFastPairDeviceUpdater.registerCallback();
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}
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mContext.registerReceiver(mReceiver, mIntentFilter, Context.RECEIVER_EXPORTED_UNAUDITED);
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}
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@Override
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public void onStop(@NonNull LifecycleOwner owner) {
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if (mFastPairDeviceUpdater != null) {
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mFastPairDeviceUpdater.unregisterCallback();
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}
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mContext.unregisterReceiver(mReceiver);
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}
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@Override
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public void displayPreference(PreferenceScreen screen) {
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super.displayPreference(screen);
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mPreferenceGroup = screen.findPreference(getPreferenceKey());
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mSeeAllPreference = mPreferenceGroup.findPreference(KEY_SEE_ALL);
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updatePreferenceVisibility();
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if (isAvailable()) {
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final Context context = screen.getContext();
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mFastPairDeviceUpdater.setPreferenceContext(context);
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mFastPairDeviceUpdater.forceUpdate();
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}
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}
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@Override
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public int getAvailabilityStatus() {
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return (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
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&& mFastPairDeviceUpdater != null)
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? AVAILABLE
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: UNSUPPORTED_ON_DEVICE;
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}
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@Override
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public void onDeviceAdded(Preference preference) {
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if (preference == null) {
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if (DEBUG) {
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Log.d(TAG, "onDeviceAdd receives null preference. Ignore.");
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}
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return;
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}
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// Keep showing the latest MAX_DEVICE_NUM devices.
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// The preference for the latest device has top preference order.
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int idx = Collections.binarySearch(mPreferenceList, preference);
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// Binary search returns the index of the search key if it is contained in the list;
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// otherwise, (-(insertion point) - 1).
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// The insertion point is defined as the point at which the key would be inserted into the
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// list: the index of the first element greater than the key, or list.size() if all elements
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// in the list are less than the specified key.
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if (idx > 0) {
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if (DEBUG) {
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Log.d(TAG, "onDeviceAdd receives duplicate preference. Ignore.");
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}
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return;
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}
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idx = -1 * (idx + 1);
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mPreferenceList.add(idx, preference);
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if (idx < MAX_DEVICE_NUM) {
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if (mPreferenceList.size() > MAX_DEVICE_NUM) {
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mPreferenceGroup.removePreference(mPreferenceList.get(MAX_DEVICE_NUM));
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}
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mPreferenceGroup.addPreference(preference);
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}
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updatePreferenceVisibility();
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}
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@Override
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public void onDeviceRemoved(Preference preference) {
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if (preference == null) {
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if (DEBUG) {
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Log.d(TAG, "onDeviceRemoved receives null preference. Ignore.");
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}
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return;
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}
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// Keep showing the latest MAX_DEVICE_NUM devices.
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// The preference for the latest device has top preference order.
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final int idx = mPreferenceList.indexOf(preference);
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mPreferenceList.remove(preference);
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if (idx < MAX_DEVICE_NUM) {
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mPreferenceGroup.removePreference(preference);
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if (mPreferenceList.size() >= MAX_DEVICE_NUM) {
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mPreferenceGroup.addPreference(mPreferenceList.get(MAX_DEVICE_NUM - 1));
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}
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}
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updatePreferenceVisibility();
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}
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@VisibleForTesting
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void setPreferenceGroup(PreferenceGroup preferenceGroup) {
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mPreferenceGroup = preferenceGroup;
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}
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@VisibleForTesting
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void updatePreferenceVisibility() {
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if (mBluetoothAdapter != null
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&& mBluetoothAdapter.isEnabled()
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&& mPreferenceList.size() > 0) {
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mPreferenceGroup.setVisible(true);
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mSeeAllPreference.setVisible(mPreferenceList.size() > MAX_DEVICE_NUM);
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} else {
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mPreferenceGroup.setVisible(false);
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mSeeAllPreference.setVisible(false);
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}
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}
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}
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