From 57853421e89dc13122afbd2853202daaf8c86e24 Mon Sep 17 00:00:00 2001
From: ywy <yinwenyao@huawei.com>
Date: Tue, 21 Oct 2025 11:39:29 +0800
Subject: [PATCH] fix development settings crash because of bluetooth modified

---
 ...ectedAudioDevicesPreferenceController.java | 112 ++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 aosp/packages/apps/Settings/src/com/android/settings/development/BluetoothMaxConnectedAudioDevicesPreferenceController.java

diff --git a/aosp/packages/apps/Settings/src/com/android/settings/development/BluetoothMaxConnectedAudioDevicesPreferenceController.java b/aosp/packages/apps/Settings/src/com/android/settings/development/BluetoothMaxConnectedAudioDevicesPreferenceController.java
new file mode 100644
index 000000000..b488bbad5
--- /dev/null
+++ b/aosp/packages/apps/Settings/src/com/android/settings/development/BluetoothMaxConnectedAudioDevicesPreferenceController.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 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 android.bluetooth.BluetoothManager;
+import android.content.Context;
+import android.os.SystemProperties;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class BluetoothMaxConnectedAudioDevicesPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
+        PreferenceControllerMixin {
+
+    private static final String MAX_CONNECTED_AUDIO_DEVICES_PREFERENCE_KEY =
+            "bluetooth_max_connected_audio_devices";
+
+    @VisibleForTesting
+    static final String MAX_CONNECTED_AUDIO_DEVICES_PROPERTY =
+            "persist.bluetooth.maxconnectedaudiodevices";
+
+    private int mDefaultMaxConnectedAudioDevices = 0;
+
+    public BluetoothMaxConnectedAudioDevicesPreferenceController(Context context) {
+        super(context);
+
+        final BluetoothManager bluetoothManager = context.getSystemService(BluetoothManager.class);
+        /* TODO蓝牙服务未开发，当前关闭该服务，注释蓝牙相关流程（USB调试）防止开发者选项崩溃
+        mDefaultMaxConnectedAudioDevices =
+              bluetoothManager.getAdapter().getMaxConnectedAudioDevices();
+        */
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return MAX_CONNECTED_AUDIO_DEVICES_PREFERENCE_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final ListPreference listPreference = (ListPreference) mPreference;
+        final CharSequence[] entries = listPreference.getEntries();
+        entries[0] = String.format(entries[0].toString(), mDefaultMaxConnectedAudioDevices);
+        listPreference.setEntries(entries);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        String newValueString = newValue.toString();
+        final ListPreference listPreference = (ListPreference) preference;
+        if (listPreference.findIndexOfValue(newValueString) <= 0) {
+            // Reset property value when default is chosen or when value is illegal
+            newValueString = "";
+        }
+        SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, newValueString);
+        updateState(preference);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final ListPreference listPreference = (ListPreference) preference;
+        final CharSequence[] entries = listPreference.getEntries();
+        final String currentValue = SystemProperties.get(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY);
+        int index = 0;
+        if (!currentValue.isEmpty()) {
+            index = listPreference.findIndexOfValue(currentValue);
+            if (index < 0) {
+                // Reset property value when value is illegal
+                SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, "");
+                index = 0;
+            }
+        }
+        listPreference.setValueIndex(index);
+        listPreference.setSummary(entries[index]);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        super.onDeveloperOptionsSwitchEnabled();
+        updateState(mPreference);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, "");
+        updateState(mPreference);
+    }
+}
+
-- 
Gitee