【Android11】AOSPSettings增加蓝牙开关

基于Android11增加一个蓝牙开关按钮然后控制蓝牙开关

首先控制蓝牙开关的逻辑很简单，bluetoothAdapter.disable();就可以关闭。这里需要用到android.bluetooth.BluetoothAdapter;

1.找到蓝牙界面的xml文件加个按钮

--- a/packages/apps/Settings/res/xml/connected_devices.xml
+++ b/packages/apps/Settings/res/xml/connected_devices.xml
@@ -20,6 +20,11 @@android:key="connected_devices_screen"android:title="@string/connected_devices_dashboard_title">+    <SwitchPreference
+        android:key="toggle_bluetooth"
+        android:title="@string/bluetooth_switch_title"
+        android:summary="@string/bluetooth_switch_summary"/>
+ <com.android.settings.slices.SlicePreferenceandroid:key="bt_nearby_slice"android:title="@string/summary_placeholder"

2. 在Fragment.java里面添加控制逻辑

这里我曾经尝试写新的controller去控制最后没成功，然后又催的比较急。就粗暴一点直接写在Fragment里面了。

--- a/packages/apps/Settings/src/com/android/settings/connecteddevice/ConnectedDeviceDashboardFragment.java
+++ b/packages/apps/Settings/src/com/android/settings/connecteddevice/ConnectedDeviceDashboardFragment.java
@@ -28,6 +28,11 @@ import com.android.settings.dashboard.DashboardFragment;import com.android.settings.search.BaseSearchIndexProvider;import com.android.settings.slices.SlicePreferenceController;import com.android.settingslib.search.SearchIndexable;
+import androidx.preference.SwitchPreferenceCompat;
+import androidx.preference.SwitchPreference;
+import androidx.preference.Preference;
+import android.bluetooth.BluetoothAdapter;
+import android.os.Bundle;@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)public class ConnectedDeviceDashboardFragment extends DashboardFragment {
@@ -38,6 +43,7 @@ public class ConnectedDeviceDashboardFragment extends DashboardFragment {static final String KEY_CONNECTED_DEVICES = "connected_device_list";@VisibleForTestingstatic final String KEY_AVAILABLE_DEVICES = "available_device_list";
+    static final String KEY_TOGGLE_BLUETOOTH = "toggle_bluetooth";@Overridepublic int getMetricsCategory() {
@@ -77,6 +83,37 @@ public class ConnectedDeviceDashboardFragment extends DashboardFragment {: null);}+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        SwitchPreference bluetoothSwitch = findPreference(KEY_TOGGLE_BLUETOOTH);
+        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+        if (bluetoothSwitch != null) {
+            bluetoothSwitch.setChecked(bluetoothAdapter.isEnabled());
+            bluetoothSwitch.setOnPreferenceChangeListener(
+                new Preference.OnPreferenceChangeListener() {
+                    @Override
+                    public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        boolean isChecked = (Boolean) newValue;
+                        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+                        if (bluetoothAdapter != null) {
+                            if (isChecked) {
+                                if (!bluetoothAdapter.isEnabled()) {
+                                    bluetoothAdapter.enable();
+                                }
+                            } else {
+                                if (bluetoothAdapter.isEnabled()) {
+                                    bluetoothAdapter.disable();
+                                }
+                            }
+                        }
+                        return true;
+                    }
+                }
+            );
+        }
+    }
+