src/com/android/settings/development/BluetoothA2dpHwOffloadPreferenceController.java

/*
 * Copyright 2018 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.development;

import static com.android.settings.development.BluetoothLeAudioHwOffloadPreferenceController.LE_AUDIO_OFFLOAD_DISABLED_PROPERTY;

import android.content.Context;
import android.os.SystemProperties;

import androidx.annotation.Nullable;
import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;
import androidx.preference.TwoStatePreference;

import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.development.DeveloperOptionsPreferenceController;

public class BluetoothA2dpHwOffloadPreferenceController extends DeveloperOptionsPreferenceController
        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {

    private static final String PREFERENCE_KEY = "bluetooth_disable_a2dp_hw_offload";
    @Nullable private final DevelopmentSettingsDashboardFragment mFragment;

    static final String A2DP_OFFLOAD_DISABLED_PROPERTY = "persist.bluetooth.a2dp_offload.disabled";
    static final String A2DP_OFFLOAD_SUPPORTED_PROPERTY = "ro.bluetooth.a2dp_offload.supported";

    @VisibleForTesting
    boolean mChanged = false;

    public BluetoothA2dpHwOffloadPreferenceController(Context context,
            @Nullable DevelopmentSettingsDashboardFragment fragment) {
        super(context);
        mFragment = fragment;
    }

    @Override
    public String getPreferenceKey() {
        return PREFERENCE_KEY;
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        BluetoothRebootDialog.show(mFragment);
        mChanged = true;
        return false;
    }

    @Override
    public void updateState(Preference preference) {
        super.updateState(preference);
        final boolean offloadSupported =
                SystemProperties.getBoolean(A2DP_OFFLOAD_SUPPORTED_PROPERTY, false);
        if (offloadSupported) {
            final boolean offloadDisabled =
                    SystemProperties.getBoolean(A2DP_OFFLOAD_DISABLED_PROPERTY, false);
            ((TwoStatePreference) mPreference).setChecked(offloadDisabled);
        } else {
            mPreference.setEnabled(false);
            ((TwoStatePreference) mPreference).setChecked(true);
        }
    }

    @Override
    protected void onDeveloperOptionsSwitchEnabled() {
        super.onDeveloperOptionsSwitchEnabled();
        updateState(mPreference);
    }

    @Override
    protected void onDeveloperOptionsSwitchDisabled() {
        super.onDeveloperOptionsSwitchDisabled();
        final boolean offloadSupported =
                SystemProperties.getBoolean(A2DP_OFFLOAD_SUPPORTED_PROPERTY, false);
        if (offloadSupported) {
            ((TwoStatePreference) mPreference).setChecked(false);
            SystemProperties.set(A2DP_OFFLOAD_DISABLED_PROPERTY, "false");
        }
    }

    public boolean isDefaultValue() {
        final boolean offloadSupported =
                SystemProperties.getBoolean(A2DP_OFFLOAD_SUPPORTED_PROPERTY, false);
        final boolean offloadDisabled =
                    SystemProperties.getBoolean(A2DP_OFFLOAD_DISABLED_PROPERTY, false);
        return offloadSupported ? !offloadDisabled : true;
    }

    /**
     * Called when the RebootDialog confirm is clicked.
     */
    public void onRebootDialogConfirmed() {
        if (!mChanged) {
            return;
        }
        final boolean offloadDisabled =
                SystemProperties.getBoolean(A2DP_OFFLOAD_DISABLED_PROPERTY, false);
        SystemProperties.set(A2DP_OFFLOAD_DISABLED_PROPERTY, Boolean.toString(!offloadDisabled));
        if (!offloadDisabled) {
            SystemProperties.set(LE_AUDIO_OFFLOAD_DISABLED_PROPERTY,
                    Boolean.toString(!offloadDisabled));
        }
    }

    /**
     * Called when the RebootDialog cancel is clicked.
     */
    public void onRebootDialogCanceled() {
        mChanged = false;
    }
}