Android Studio - 找到服务，但在 GattCallback 中的 onServicesDiscovered 中断开连接

问题描述

我尝试将我的 Android 手机连接到 BLE 设备（Bluefruit Feather 32u4 板），但我在 Gatt 回调的 onServicesdiscovered() 函数中立即断开连接。

我在 onConnectionStateChange() 方法中成功连接到设备，所以我调用 onServicesdiscovered() 然后断开连接。知道为什么吗？如果您有任何想法，我将不胜感激。

以下是我捕获进程和 Gatt 回调函数的日志快照：

log

private BluetoothGattCallback bluetoothGattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(final BluetoothGatt gatt,final int status,final int newState) {
        if (status == BluetoothGatt.GATT_SUCCESS) {
            Log.d(TAG,"onConnectionStateChange: GATT_SUCCESS");
            int bondstate = device.getBondState();
            //Take action depending on the bond state
            //can't discover services when still bonding
            if (bondstate == BOND_NONE || bondstate == BOND_BONDED) {
                if (newState == BluetoothProfile.STATE_CONNECTED) {
                    Log.d(TAG,"onConnectionStateChange: STATE_CONNECTED");
                    boolean result = gatt.discoverServices();
                    if (!result) {
                        textView.setText("Failed to discover services.");
                        Log.d(TAG,"onConnectionStateChange: Failed TO disCOVER SERVICES");
                        return;
                    } else {
                        textView.setText("Found services.");
                        Log.d(TAG,"onConnectionStateChange: FOUND SERVICES");
                    }
                } else {
                    //gatt status is either disconnected,disconnecting or connecting so can't discover services
                    //or an error has occurred
                    Log.d(TAG,"onConnectionStateChange: ERROR. disCONNECTED.");
                    gatt.close();
                }
            }
        }
    }

    @Override
    public void onServicesdiscovered(BluetoothGatt gatt,int status) {
        super.onServicesdiscovered(gatt,status);
       //if an error has occurred,return; need to retry the connection
        if (status == GATT_INTERNAL_ERROR) {
            Log.d(TAG,"onServicesdiscovered: GATT_INTERNAL_ERROR");
           textView.setText("An internal error has occurred when discovering services.");
            gatt.disconnect();
            return;
        }
        //if accidentally got disconnected,close
        else if (status == BluetoothProfile.STATE_disCONNECTED) {
            Log.d(TAG,"onServicesdiscovered: disCONNECTED.");
            textView.setText("On Services: disconnected.");
            gatt.close();
            return;
        }
        //assuming that everything went fine,get the discovered services
        else {
            Log.d(TAG,"onServicesdiscovered: LOOK FOR SERVICES");
            final List<BluetoothGattService> services = gatt.getServices();
            listView.setAdapter((listadapter) gattAdapter);

        }
    }
};

解决方法

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