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Commit dab5bd82 authored by Sharvil Nanavati's avatar Sharvil Nanavati
Browse files

Read connection intervals from config.xml so it can be overriden by device. 

Wear needs the minimum possible connection interval for BLE connections
to support the Wear iOS companion app. This change simply moves the hard-
coded connection intervals to config.xml so they can be overriden for
Wear devices.

Bug: 23903184
Change-Id: I1f60772ef6a100ad5e4f02f629b5ca6e80fc207a
parent 8fd9ccb4

android/app/res/values/config.xml

+8 −0
Original line number Diff line number Diff line
@@ -33,4 +33,12 @@ 
         fire Bluetooth LE scan result callbacks in addition to having one

         of the location permissions. -->

    <bool name="strict_location_check">true</bool>



    <!-- Specifies the min/max connection interval parameters for high priority

         and low power GATT configurations. These values are in multiples of

         1.25ms. -->

    <integer name="gatt_high_priority_min_interval">9</integer>

    <integer name="gatt_high_priority_max_interval">12</integer>

    <integer name="gatt_low_power_min_interval">80</integer>

    <integer name="gatt_low_power_max_interval">100</integer>

</resources>

android/app/src/com/android/bluetooth/gatt/GattService.java

+4 −4
Original line number Diff line number Diff line
@@ -1673,13 +1673,13 @@ public class GattService extends ProfileService { 
        switch (connectionPriority)

        {

            case BluetoothGatt.CONNECTION_PRIORITY_HIGH:

                minInterval = 9; // 11.25ms

                maxInterval = 12; // 15ms

                minInterval = getResources().getInteger(R.integer.gatt_high_priority_min_interval);

                maxInterval = getResources().getInteger(R.integer.gatt_high_priority_max_interval);

                break;



            case BluetoothGatt.CONNECTION_PRIORITY_LOW_POWER:

                minInterval = 80; // 100ms

                maxInterval = 100; // 125ms

                minInterval = getResources().getInteger(R.integer.gatt_low_power_min_interval);

                maxInterval = getResources().getInteger(R.integer.gatt_low_power_max_interval);

                latency = 2;

                break;

        }