Using reflection to get private BluetoothHearingAid APIs for short term

* APIs: getDeviceSideInternal(), getDeviceModeInternal()

Bug: 224323976
Test: manual test
Change-Id: I76e078225634bd9a58fd6cdddd53a3ff9d4c6348

packages/SettingsLib/src/com/android/settingslib/bluetooth/HearingAidProfile.java

@@ -29,13 +29,48 @@ import android.bluetooth.BluetoothProfile;
 import android.content.Context;
 import android.util.Log;
 
+import androidx.annotation.IntDef;
+import androidx.annotation.NonNull;
+
 import com.android.settingslib.R;
 import com.android.settingslib.Utils;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
 
 public class HearingAidProfile implements LocalBluetoothProfile {
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+            DeviceSide.SIDE_INVALID,
+            DeviceSide.SIDE_LEFT,
+            DeviceSide.SIDE_RIGHT
+    })
+
+    /** Side definition for hearing aids. See {@link BluetoothHearingAid}. */
+    public @interface DeviceSide {
+        int SIDE_INVALID = -1;
+        int SIDE_LEFT = 0;
+        int SIDE_RIGHT = 1;
+    }
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+            DeviceMode.MODE_INVALID,
+            DeviceMode.MODE_MONAURAL,
+            DeviceMode.MODE_BINAURAL
+    })
+
+    /** Mode definition for hearing aids. See {@link BluetoothHearingAid}. */
+    public @interface DeviceMode {
+        int MODE_INVALID = -1;
+        int MODE_MONAURAL = 0;
+        int MODE_BINAURAL = 1;
+    }
+
     private static final String TAG = "HearingAidProfile";
     private static boolean V = true;
 
@@ -212,6 +247,11 @@ public class HearingAidProfile implements LocalBluetoothProfile {
         return isEnabled;
     }
 
+    /**
+     * Tells remote device to set an absolute volume.
+     *
+     * @param volume Absolute volume to be set on remote
+     */
     public void setVolume(int volume) {
         if (mService == null) {
             return;
@@ -219,6 +259,12 @@ public class HearingAidProfile implements LocalBluetoothProfile {
         mService.setVolume(volume);
     }
 
+    /**
+     * Gets the HiSyncId (unique hearing aid device identifier) of the device.
+     *
+     * @param device Bluetooth device
+     * @return the HiSyncId of the device
+     */
     public long getHiSyncId(BluetoothDevice device) {
         if (mService == null || device == null) {
             return BluetoothHearingAid.HI_SYNC_ID_INVALID;
@@ -226,6 +272,59 @@ public class HearingAidProfile implements LocalBluetoothProfile {
         return mService.getHiSyncId(device);
     }
 
+    /**
+     * Gets the side of the device.
+     *
+     * @param device Bluetooth device.
+     * @return side of the device. See {@link DeviceSide}.
+     */
+    @DeviceSide
+    public int getDeviceSide(@NonNull BluetoothDevice device) {
+        final int defaultValue = DeviceSide.SIDE_INVALID;
+        if (mService == null) {
+            Log.w(TAG, "Proxy not attached to HearingAidService");
+            return defaultValue;
+        }
+
+        try {
+            Method method = mService.getClass().getDeclaredMethod("getDeviceSideInternal",
+                    BluetoothDevice.class);
+            method.setAccessible(true);
+            return (int) method.invoke(mService, device);
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+            Log.e(TAG, "fail to get getDeviceSideInternal\n" + e.toString() + "\n"
+                    + Log.getStackTraceString(new Throwable()));
+            return defaultValue;
+        }
+    }
+
+    /**
+     * Gets the mode of the device.
+     *
+     * @param device Bluetooth device
+     * @return mode of the device. See {@link DeviceMode}.
+     */
+    @DeviceMode
+    public int getDeviceMode(@NonNull BluetoothDevice device) {
+        final int defaultValue = DeviceMode.MODE_INVALID;
+        if (mService == null) {
+            Log.w(TAG, "Proxy not attached to HearingAidService");
+            return defaultValue;
+        }
+
+        try {
+            Method method = mService.getClass().getDeclaredMethod("getDeviceModeInternal",
+                    BluetoothDevice.class);
+            method.setAccessible(true);
+            return (int) method.invoke(mService, device);
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+            Log.e(TAG, "fail to get getDeviceModeInternal\n" + e.toString() + "\n"
+                    + Log.getStackTraceString(new Throwable()));
+
+            return defaultValue;
+        }
+    }
+
     public String toString() {
         return NAME;
     }