1 files changed, 44 insertions, 0 deletions
diff --git a/src/android/bluetooth/src/org/qtproject/qt/android/bluetooth/QtBluetoothGattCharacteristic.java b/src/android/bluetooth/src/org/qtproject/qt/android/bluetooth/QtBluetoothGattCharacteristic.java
new file mode 100644
index 00000000..375aebb5
--- /dev/null
+++ b/src/android/bluetooth/src/org/qtproject/qt/android/bluetooth/QtBluetoothGattCharacteristic.java
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+package org.qtproject.qt.android.bluetooth;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.os.Build;
+
+import java.util.UUID;
+
+public class QtBluetoothGattCharacteristic extends BluetoothGattCharacteristic {
+    public QtBluetoothGattCharacteristic(UUID uuid, int properties, int permissions,
+                                         int minimumValueLength, int maximumValueLength) {
+        super(uuid, properties, permissions);
+        minValueLength = minimumValueLength;
+        maxValueLength = maximumValueLength;
+    }
+    public int minValueLength;
+    public int maxValueLength;
+    // Starting from API 33 Android Bluetooth deprecates characteristic local value caching by
+    // deprecating the getValue() and setValue() accessors. For peripheral role we store the value
+    // locally in the characteristic as a convenience - looking up the value on the C++ side would
+    // be somewhat complicated. This should be safe as all accesses to this class are synchronized.
+    // For clarity: For API levels below 33 we still need to use the setValue() of the base class
+    // because Android internally uses getValue() with APIs below 33.
+    public boolean setLocalValue(byte[] value) {
+        if (Build.VERSION.SDK_INT >= 33) {
+            m_localValue = value;
+            return true;
+        } else {
+            return setValue(value);
+        }
+    }
+
+    public byte[] getLocalValue()
+    {
+        if (Build.VERSION.SDK_INT >= 33)
+            return m_localValue;
+        else
+            return getValue();
+    }
+
+    private byte[] m_localValue = null;
+}