bluetooth: android: Implement & test CreateGattConnection.

device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java

Index: device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
diff --git a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
index 3536bf8e4118069655ade0e82b5a9f46fe21b0ce..bc76234b15d58707aefb61df26f65ac30c40ee60 100644
--- a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
+++ b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothDevice.java
@@ -6,6 +6,7 @@ package org.chromium.device.bluetooth;
 
 import android.annotation.TargetApi;
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
 import android.os.Build;
 import android.os.ParcelUuid;
 
@@ -26,10 +27,14 @@ import java.util.List;
 final class ChromeBluetoothDevice {
     private static final String TAG = "cr.Bluetooth";
 
-    private final Wrappers.BluetoothDeviceWrapper mDevice;
+    private long mNativeBluetoothDeviceAndroid;
+    final Wrappers.BluetoothDeviceWrapper mDevice;
     private List<ParcelUuid> mUuidsFromScan;
+    Wrappers.BluetoothGattWrapper mBluetoothGatt;
 
-    private ChromeBluetoothDevice(Wrappers.BluetoothDeviceWrapper deviceWrapper) {
+    private ChromeBluetoothDevice(
+            long nativeBluetoothDeviceAndroid, Wrappers.BluetoothDeviceWrapper deviceWrapper) {
+        mNativeBluetoothDeviceAndroid = nativeBluetoothDeviceAndroid;
         mDevice = deviceWrapper;
         Log.v(TAG, "ChromeBluetoothDevice created.");
     }
@@ -41,8 +46,10 @@ final class ChromeBluetoothDevice {
     // 'Object' type must be used because inner class Wrappers.BluetoothDeviceWrapper reference is
     // not handled by jni_generator.py JavaToJni. http://crbug.com/505554
     @CalledByNative
-    private static ChromeBluetoothDevice create(Object deviceWrapper) {
-        return new ChromeBluetoothDevice((Wrappers.BluetoothDeviceWrapper) deviceWrapper);
+    private static ChromeBluetoothDevice create(
+            long nativeBluetoothDeviceAndroid, Object deviceWrapper) {
+        return new ChromeBluetoothDevice(
+                nativeBluetoothDeviceAndroid, (Wrappers.BluetoothDeviceWrapper) deviceWrapper);
     }
 
     // Implements BluetoothDeviceAndroid::UpdateAdvertisedUUIDs.
@@ -89,9 +96,49 @@ final class ChromeBluetoothDevice {
         return string_array;
     }
 
+    // Implements BluetoothDeviceAndroid::CreateGattConnectionImpl.
+    @CalledByNative
+    private boolean createGattConnectionImpl(Context context) {
+        if (mBluetoothGatt == null) {
+            Log.i(TAG, "connectGatt");

[Jeffrey Yasskin, 2015/08/20 21:35:13]

Do we still need all this logging?

[scheib, 2015/09/13 02:41:01]

I've reduced some and filed crbug.com/529510 to remember to revisit. These log
statements aren't frequent and will offer high value in diagnosing issues on
production builds.

+            mBluetoothGatt = mDevice.connectGatt(
+                    context, false /* autoConnect */, new BluetoothGattCallbackImpl());
+        }
+        boolean connectResult = mBluetoothGatt.connect();

[Jeffrey Yasskin, 2015/08/20 21:35:13]

Calling .connect() appears to ask Android to connect whenever the device comes
into range, which looks equivalent to connectGatt(autoConnect=true).

I'm not sure whether we want to time out or just let the connection complete
whenever: https://github.com/WebBluetoothCG/web-bluetooth/issues/152. I'm
leaning toward letting it wait, which implies connectGatt(autoConnect=true)
above.

[scheib, 2015/09/13 02:41:01]

So, autoconnect=true isn't working on devices I'm testing with. For now, I'm
going to create a direct connection. The previous call to
mBluetoothGatt.connect() was redundant, so that's removed.

+        Log.i(TAG, "BluetoothGatt.connect returned %b", connectResult);
+        return connectResult;
+    }
+
+    // Implements BluetoothDeviceAndroid::DisconnectGatt.
+    @CalledByNative
+    private void disconnectGatt() {
+        Log.i(TAG, "BluetoothGatt.disconnect");
+        mBluetoothGatt.disconnect();
+    }
+
     // Implements BluetoothDeviceAndroid::GetDeviceName.
     @CalledByNative
     private String getDeviceName() {
         return mDevice.getName();
     }
+
+    // Implements callbacks related to a GATT connection.
+    private class BluetoothGattCallbackImpl extends Wrappers.BluetoothGattCallbackWrapper {
+        @Override
+        public void onConnectionStateChange(int status, int newState) {
+            Log.i(TAG, "onConnectionStateChange status:%d newState:%s", status,
+                    (newState == android.bluetooth.BluetoothProfile.STATE_CONNECTED)
+                            ? "Connected"
+                            : "Dissconnected");

[Jeffrey Yasskin, 2015/08/20 21:35:13]

sp: Dissconnected

[scheib, 2015/09/13 02:41:01]

Done.

+            nativeOnConnectionStateChange(mNativeBluetoothDeviceAndroid, status,
+                    newState == android.bluetooth.BluetoothProfile.STATE_CONNECTED);
+        }
+    }
+
+    // ---------------------------------------------------------------------------------------------
+    // BluetoothAdapterDevice C++ methods declared for access from java:
+
+    // Binds to BluetoothDeviceAndroid::OnConnectionStateChange.
+    private native void nativeOnConnectionStateChange(
+            long nativeBluetoothDeviceAndroid, int success, boolean connected);

[Jeffrey Yasskin, 2015/08/20 21:35:13]

s/success/status/

[scheib, 2015/09/13 02:41:01]

Done.

 }