Android BluetoothChat OBD-II设备没有响应

Question

我运行BluetoothChat应用程序时所做的修改如下：

BluetoothChatService

// Unique UUID for this application
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

BluetoothChatService

// The action listener for the EditText widget, to listen for the return key
private TextView.OnEditorActionListener mWriteListener =
    new TextView.OnEditorActionListener() {
    public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
        // If the action is a key-up event on the return key, send the message
        if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) {
            String message = view.getText().toString();
            sendMessage(message+ "\r");//My CHANGE
        }
        if(D) Log.i(TAG, "END onEditorAction");
        return true;
    }
};

与OBD设备的连接是完美的，但当我发送"ATI“或"010C”等时，我不会从该设备接收任何数据。

我在Android4.4.2( Kat)中运行该应用程序，该应用程序基于Android2.2中的示例BluetoothChat应用程序

Answer 1

我让它为我工作。

与其修改TextView.OnEditorActionListener，不如在BluetoothChatFragment中修改sendMessage()，如下所示：

private void sendMessage(String message) {
    message = message + '\r'; //MY CHANGE
    // Check that we're actually connected before trying anything
    if (mChatService.getState() != BluetoothChatService.STATE_CONNECTED) {
        Toast.makeText(getActivity(), R.string.not_connected, Toast.LENGTH_SHORT).show();
        return;
    }

    // Check that there's actually something to send
    if (message.length() > 0) {
        // Get the message bytes and tell the BluetoothChatService to write
        byte[] send = message.getBytes();
        mChatService.write(send);

        // Reset out string buffer to zero and clear the edit text field
        mOutStringBuffer.setLength(0);
        mOutEditText.setText(mOutStringBuffer);
    }
}

问题是发送按钮没有通过编辑器操作侦听器。

Answer 2

我也面临着同样的问题，但你的解决方案似乎只是部分地解决了问题。有时起作用，有时不起作用。我必须重新编译它，直到它工作为止。