Google Play服务示例：“connectionResult无法解析”

Question

当我试图按照如何检查是否安装了Google Play服务的示例时，我收到以下错误：“connectionResult无法解析”在servicesConnected方法中的行

int errorCode = connectionResult.getErrorCode();

可能缺少什么？我正在复制并粘贴它。 我正在关注示例here

谢谢！

Answer 1

这是示例中的错误。请改用：

        } else {
        // Get the error code
        // Get the error dialog from Google Play services
        Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
                resultCode,
                this,
                CONNECTION_FAILURE_RESOLUTION_REQUEST);

Answer 2

它所说的缺少返回的解决方案是在else的结尾处添加return false这样的例子：

否则         {             //获取错误代码

        // Get the error dialog from Google Play services
        Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
                resultCode,
                this,
                CONNECTION_FAILURE_RESOLUTION_REQUEST);

        // If Google Play services can provide an error dialog
        if (errorDialog != null) {
            // Create a new DialogFragment for the error dialog
            ErrorDialogFragment errorFragment =
                    new ErrorDialogFragment();
            // Set the dialog in the DialogFragment
            errorFragment.setDialog(errorDialog);
            // Show the error dialog in the DialogFragment
            errorFragment.show(getSupportFragmentManager(),
                    "Location Updates");
        }
        return false;//THIS NEEDS TO BE FALSE 
    }