Merge "[Temp bonding] Controller for the guest list to store temp bond device" into main

src/com/android/settings/connecteddevice/audiosharing/TemporaryBondDeviceGroupController.java

@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2025 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.connecteddevice.audiosharing;
+
+import android.content.Context;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.DefaultLifecycleObserver;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.bluetooth.BluetoothDeviceUpdater;
+import com.android.settings.bluetooth.Utils;
+import com.android.settings.connecteddevice.DevicePreferenceCallback;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settingslib.bluetooth.BluetoothCallback;
+import com.android.settingslib.bluetooth.BluetoothEventManager;
+import com.android.settingslib.bluetooth.BluetoothUtils;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+import com.android.settingslib.flags.Flags;
+import com.android.settingslib.utils.ThreadUtils;
+
+/**
+ * Controller to maintain the {@link androidx.preference.PreferenceGroup} for all connected
+ * temporary bond devices. It uses {@link DevicePreferenceCallback} to add/remove
+ * {@link Preference}
+ */
+public class TemporaryBondDeviceGroupController extends BasePreferenceController implements
+        DefaultLifecycleObserver, DevicePreferenceCallback, BluetoothCallback {
+    private static final String TAG = "TemporaryBondDeviceGroupController";
+    private static final String KEY = "temp_bond_device_list";
+
+    @Nullable
+    private final BluetoothEventManager mEventManager;
+    @Nullable
+    private PreferenceGroup mPreferenceGroup;
+    @Nullable
+    private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
+
+
+    public TemporaryBondDeviceGroupController(@NonNull Context context) {
+        super(context, KEY);
+        LocalBluetoothManager btManager = Utils.getLocalBtManager(mContext);
+        mEventManager = btManager == null ? null : btManager.getEventManager();
+    }
+
+    @Override
+    public void onStart(@NonNull LifecycleOwner owner) {
+        if (!isAvailable()) {
+            Log.d(TAG, "Skip onStart(), feature is not supported.");
+            return;
+        }
+        if (mEventManager == null) {
+            Log.d(TAG, "onStart() Bluetooth is not supported on this device");
+            return;
+        }
+        var unused = ThreadUtils.postOnBackgroundThread(() -> {
+            mEventManager.registerCallback(this);
+            if (mBluetoothDeviceUpdater != null) {
+                mBluetoothDeviceUpdater.registerCallback();
+                mBluetoothDeviceUpdater.refreshPreference();
+            }
+        });
+    }
+
+    @Override
+    public void onStop(@NonNull LifecycleOwner owner) {
+        var unused = ThreadUtils.postOnBackgroundThread(() -> {
+            if (mBluetoothDeviceUpdater != null) {
+                mBluetoothDeviceUpdater.unregisterCallback();
+            }
+            if (mEventManager != null) {
+                mEventManager.unregisterCallback(this);
+                return;
+            }
+            Log.d(TAG, "onStop() Bluetooth is not supported on this device");
+        });
+    }
+
+    @Override
+    public void displayPreference(@NonNull PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreferenceGroup = screen.findPreference(KEY);
+        if (mPreferenceGroup != null) {
+            mPreferenceGroup.setVisible(false);
+        }
+
+        if (isAvailable() && mBluetoothDeviceUpdater != null) {
+            mBluetoothDeviceUpdater.setPrefContext(screen.getContext());
+            mBluetoothDeviceUpdater.forceUpdate();
+        }
+    }
+
+    @Override
+    public void onDeviceAdded(@NonNull Preference preference) {
+        if (mPreferenceGroup != null) {
+            mPreferenceGroup.addPreference(preference);
+            Log.d(TAG, "Temporary bond device added");
+            if (mPreferenceGroup.getPreferenceCount() == 1) {
+                mPreferenceGroup.setVisible(true);
+            }
+        }
+    }
+
+    @Override
+    public void onDeviceRemoved(@NonNull Preference preference) {
+        if (mPreferenceGroup != null) {
+            mPreferenceGroup.removePreference(preference);
+            Log.d(TAG, "Temporary bond device removed");
+            if (mPreferenceGroup.getPreferenceCount() == 0) {
+                mPreferenceGroup.setVisible(false);
+            }
+        }
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return (BluetoothUtils.isAudioSharingUIAvailable(mContext)
+                && mBluetoothDeviceUpdater != null && Flags.enableTemporaryBondDevicesUi())
+                ? AVAILABLE_UNSEARCHABLE
+                : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    /**
+     * Initialize the controller.
+     *
+     * @param fragment The fragment to provide the context and metrics category for {@link
+     *     TemporaryBondDeviceGroupUpdater} and provide the host for dialogs.
+     */
+    public void init(@NonNull DashboardFragment fragment) {
+        mBluetoothDeviceUpdater = new TemporaryBondDeviceGroupUpdater(fragment.getContext(),
+                TemporaryBondDeviceGroupController.this,
+                fragment.getMetricsCategory());
+    }
+
+    @VisibleForTesting
+    void setBluetoothDeviceUpdater(@Nullable BluetoothDeviceUpdater bluetoothDeviceUpdater) {
+        mBluetoothDeviceUpdater = bluetoothDeviceUpdater;
+    }
+
+    @VisibleForTesting
+    void setPreferenceGroup(@Nullable PreferenceGroup preferenceGroup) {
+        mPreferenceGroup = preferenceGroup;
+    }
+}